In 1995, a leading French military contractor, Dassault Aviation, agreed to pay Mr. Zardari and a Pakistani partner $200 million for a $4 billion jet fighter deal that fell apart only when Ms. Bhutto's Government was dismissed. In another deal, a leading Swiss company hired to curb customs fraud in Pakistan paid millions of dollars between 1994 and 1996 to offshore companies controlled by Mr. Zardari and Ms. Bhutto's widowed mother, Nusrat.

During Ms. Bhutto's five years in power, the economy became so enfeebled that she spent much of her time negotiating new foreign loans to stave off default on $62 billion in public debt.

Mr. Zardari went on a shopping spree in the mid-1990's, purchasing among other things a $4 million, 355-acre estate south of London. In 1994 and 1995, he used a Swiss bank account and an American Express card to buy jewelry worth $660,000 -- including $246,000 at Cartier Inc. and Bulgari Corp. in Beverly Hills, Calif., in barely a month.

Officials leading the inquiry in Pakistan say that the $100 million they have identified so far is only a small part of a windfall from corrupt activities. They maintain that an inquiry begun in Islamabad just after Ms. Bhutto's dismissal in 1996 found evidence that her family and associates generated more than $1.5 billion in illicit profits through kickbacks in virtually every sphere of government activity -- from rice deals, to the sell-off of state land, even rake-offs from state welfare schemes.

The Pakistani officials say their key break came last summer, when an informer offered to sell documents that appeared to have been taken from the Geneva office of Jens Schlegelmilch, whom Ms. Bhutto described as the family's attorney in Europe for more than 20 years, and as a close personal friend. Pakistani investigators have confirmed that the original asking price for the documents was $10 million. Eventually the seller traveled to London and concluded the deal for $1 million in cash.

The identity of the seller remains a mystery. Mr. Schlegelmilch, 55, developed his relationship with the Bhutto family through links between his Iranian-born wife and Ms. Bhutto's mother, who was also born in Iran. In a series of telephone interviews, he declined to say anything about Mr. Zardari and Ms. Bhutto, other than that he had not sold the documents. ''It wouldn't be worth selling out for $1 million,'' he said.

The documents included: statements for several accounts in Switzerland, including the Citibank accounts in Dubai and Geneva; letters from executives promising payoffs, with details of the percentage payments to be made; memorandums detailing meetings at which these ''commissions'' and ''remunerations'' were agreed on, and certificates incorporating the offshore companies used as fronts in the deals, many registered in the British Virgin Islands.

Because Pakistan's efforts to uncover the deals have been handled in recent months by close aides of Prime Minister Sharif, who has alternated with Ms. Bhutto at the head of four civilian Governments in Pakistan since the end of military rule 10 years ago, the investigation has been deeply politicized. Last week, the Sharif aides forwarded 12 corruption cases cases against Ms. Bhutto, Mr. Zardari and Nusrat Bhutto, 68, to the country's ''accountability commission,'' headed by a retired judge, who has the power to approve formal indictments.

Apart from bolstering Mr. Sharif's power by exposing Ms. Bhutto, Mr. Sharif's aides hope to protect him against the possibility that she will one day return to office and turn the tables on him. Mr. Sharif, who is 48, battled for years during Ms. Bhutto's tenure to stay out of jail on a range of corruption charges, including allegations that he took millions of dollars in unsecured loans from state-owned banks for his family's steel empire, then defaulted.

The Bhuttos are among a few hundred so-called feudal families, mostly large landowners, that have dominated politics and business in Pakistan since its creation in 1947.

Ms. Bhutto's father was an Oxford-educated landowner who became Pakistan's Prime Minister in the 1970's, only to be ousted and jailed in 1977 when his military chief, Gen. Mohammed Zia ul-Haq, mounted a coup. Mr. Bhutto was hanged two years later, after he refused General Zia's offer of clemency for a murder conviction that many Pakistanis regarded as politically tainted.

Benazir Bhutto, the eldest of four children, spent the next decade under house arrest, in jail or in self-imposed exile, campaigning against General Zia's military regime.

In 1987 she married Mr. Zardari, little known then for anything but a passion for polo. It was an arranged union, with Ms. Bhutto's mother picking the groom. Many Pakistanis were startled by the social and financial differences. By the Bhuttos' standards, Mr. Zardari's family was of modest means, with limited holdings and a rundown movie theater in Karachi. Mr. Zardari's only experience of higher education was a stint at a commercial college in London.

In part the match was intended to protect Ms. Bhutto's political career by countering conservative Muslims' grumbling about her unmarried status. Barely eight months later, in 1988, General Zia was killed in a mysterious plane crash, which opened the way for Ms. Bhutto to win a narrow election victory.

Years later, many Pakistanis still speak of the mesmeric effect she had at that moment, as the daughter who had avenged her father and the politician who had restored democracy. But euphoria faded fast. Within months, newspapers were headlining allegations of dubious deals. In the bazaars, traders soon dubbed Mr. Zardari ''Mr. 10 Percent.''

Twenty months after she took office, Ms. Bhutto was dismissed by Pakistan's President on grounds of corruption and misrule. But the Sharif Government that succeeded Ms. Bhutto was unable to secure any convictions against her or her husband before Mr. Sharif, in turn, was ousted from office, also for corruption and misrule.  Mostly, Pakistanis gave Ms. Bhutto the benefit of the doubt after her first term, saying she might not have known what Mr. Zardari was doing. She was further aided by public suspicion of Mr. Sharif's motives. A taciturn man who got his start in politics as a protege of General Zia, Mr. Sharif has left little doubt of his chagrin at having been overshadowed by Ms. Bhutto.

Part of his discomfort stemmed from her success in fostering a favorable image for herself in the United States, as a staunch foe of Muslim fundamentalism, a relentless campaigner for the rights of the poor and -- a point she stressed in her Harvard speech in 1989 -- an opponent of leaders who use their power for personal gain, then ''leave the cupboard bare.''

When she took office as Prime Minister again, after a victory in 1993, Ms. Bhutto struck many of her friends as a changed person, obsessed with her dismissal in 1990, high-handed to the point of arrogance, and contemptuous of the liberal principles she had placed at the center of her politics in the 1980's. ''She no longer made the distinction between the Bhuttos and Pakistan,'' said Hussain Haqqani, Ms. Bhutto's former press secretary. ''In her mind, she was Pakistan, so she could do as she pleased.''

Ms. Bhutto's twin posts, as Prime Minister and Finance Minister, gave her virtually free rein. Mr. Zardari became her alter ego, riding roughshod over the bureaucracy although he had no formal economic powers until Ms. Bhutto appointed him Investment Minister, reporting only to herself, in July 1996. They maintained an imperial lifestyle in the new Prime Minister's residence in Islamabad, a $50 million mansion set on 110 acres on an Islamabad hilltop.

Within weeks of moving in, Mr. Zardari ordered 11.5 acres of protected woodland on an adjoining hilltop to be bulldozed for a polo field, an exercise track, stabling for 40 polo ponies, quarters for grooms and a parking lot for spectators. When a senior Government official, Mohammed Mehdi, objected to paying for the project with $1.3 million diverted from a budget for parks and other public amenities, Mr. Zardari ''categorically told me that he does not appreciate his orders to be examined and questioned by any authority,'' according to an affidavit filed with the Pakistani investigators by Mr. Mehdi. A few months later, with the work in progress, Mr. Zardari had Mr. Mehdi dismissed.

The investigators say that Mr. Zardari and associates he brought into the Government, some of them old school friends, began reviewing state programs for opportunities to make money. It was these broader activities, the investigators assert, more than the relatively small number of foreign deals revealed in the documents taken from the Swiss lawyer, that netted the largest sums for the Bhutto family.

Among the transactions Mr. Zardari exploited, according to these officials: defense contracts; power plant projects; the privatization of state-owned industries; the awarding of broadcast licenses; the granting of an export monopoly for the country's huge rice harvest; the purchase of planes for Pakistan International Airlines; the assignment of textile export quotas; the granting of oil and gas permits; authorizations to build sugar mills, and the sale of government lands.

The officials have said that Ms. Bhutto and Mr. Zardari took pains to avoid creating a documentary record of their role in hundreds of deals. How this was done was explained by Najam Sethi, a former Bhutto loyalist who became the editor of Pakistan's most popular political weekly, Friday Times, then was drafted to help oversee a corruption inquiry undertaken by the caretaker Government that ruled for three months after Ms. Bhutto's dismissal in 1996.

Mr. Sethi said Ms. Bhutto and Mr. Zardari adopted a system under which they assigned favors by writing orders on yellow Post-It notes and attaching them to official files. After the deals were completed, Mr. Sethi said, the notes were removed, destroying all trace of involvement.

When Mr. Sharif won a landslide election victory earlier this year, the corruption inquiry appeared, again, to fizzle. But a few days before the election, the caretakers hired Jules Kroll Associates, a New York investigative agency, to look for evidence of corruption abroad. The Kroll investigators put out feelers in Europe; Mr. Sharif's aides said it was one of these that produced the offer to sell the Bhutto family documents, and that they took over from Kroll Associates and completed the deal.

The Negotiations
Flight and Crash Of a Dassault Deal

Potentially the most lucrative deal uncovered by the documents involved the effort by Dassault Aviation, the French military contractor, to sell Pakistan 32 Mirage 2000-5 fighter planes. These were to replace two squadrons of American-made F-16's whose purchase was blocked when the Bush Administration determined in 1990 that Pakistan was covertly developing nuclear weapons.

In April 1995, Dassault found itself in arm's-length negotiations with Mr. Zardari and Amer Lodhi, a Paris-based lawyer and banker who had lived for years in the United States, working among other things as an executive of the now-defunct Bank of Commerce and Credit International. Mr. Lodhi's sister, Maleeha, a former Pakistan newspaper editor, became Ms. Bhutto's Ambassador to the United States in 1994.

The Profits
Scams at Both Ends Of Customs System

One deal that appears to have made a handsome profit for Mr. Zardari involved Pakistan's effort to increase its customs revenues. Since fewer than one in every 100 Pakistanis pays income tax, customs revenues represent the state's largest revenue source. But for decades the system has been corrupted, with businesses underinvoicing imports, or paying bribes, to escape duties.

In the 1980's Pakistan came under pressure from the International Monetary Fund to increase government revenues and to cut a runaway budget deficit. During Ms. Bhutto's first term, Pakistan entrusted preshipment ''verification'' of all major imports to two Swiss companies with blue-ribbon reputations, Societe Generale de Surveillance S.A. and a subsidiary, Cotecna Inspection S.A. But the documents suggest that this stab at improving Pakistan's fiscal soundness was quickly turned to generating profits for the Bhutto family's accounts.

In 1994, executives of the two Swiss companies wrote promising to pay ''commissions'' totaling 9 percent to three offshore companies controlled by Mr. Zardari and Nusrat Bhutto. A Cotecna letter in June 1994 was direct: ''Should we receive, within six months of today, a contract for inspection and price verification of goods imported into Pakistan,'' it read, ''we will pay you 6 percent of the total amount invoiced and paid to the Government of Pakistan for such a contract and during the whole duration of that contract and its renewal.''

Similar letters, dated March and June 1994, were sent by Societe Generale de Surveillance promising ''consultancy fees'' of 6 percent and 3 percent to two other offshore companies controlled by the Bhutto family. According to Pakistani investigators, the two Swiss companies inspected more than $15.4 billion in imports into Pakist

an from January 1995 to March 1997, making more than $131 million. The investigators estimated that the Bhutto family companies made $11.8 million from the deals, at least a third of which showed up in banking documents taken from the Swiss lawyer.

Ms. Salina Amorini said in the interview that a study of Societe Generale's dealings with Pakistan had uncovered a $650 million shortfall in customs revenues that the Bhutto Government was supposed to have collected over a 21-month period in 1995 and 1996. She said the company had reported the shortfall to Washington-based officials of the monetary fund and the World Bank, which monitor customs revenues to check Pakistan's compliance with conditions set for emergency loans. The conditions are meant to help the country avoid default on its foreign debt.

Officials at the two financial institutions are investigating the Swiss company's report to determine whether the customs system was corrupted at both ends -- from commissions paid to Bhutto family companies on the preshipment inspection contracts and, later, in illicit payments by Pakistani importers seeking to avoid the customs duties that the Swiss companies had determined they owed.

The Gold Connection
Granting a License, Reaping a Profit
Pakistan's Arabian Sea coast, stretching from Karachi to the border with Iran, has long been a gold smugglers' haven. Until the beginning of Ms. Bhutto's second term, the trade, running into hundreds of millions of dollars a year, was unregulated, with slivers of gold called biscuits, and larger weights in bullion, carried on planes and boats that travel between the Persian Gulf and the largely unguarded Pakistani coast.

Shortly after Ms. Bhutto returned as Prime Minister in 1993, a Pakistani bullion trader in Dubai, Abdul Razzak Yaqub, proposed a deal: in return for a license to import gold, Mr. Razzak would help the Government regularize the trade.

In January 1994, weeks after Ms. Bhutto began her second term, Mr. Schlegelmilch established a British Virgin Island company known as Capricorn Trading, S.A., with Mr. Zardari as its principal owner. Nine months later, on Oct. 5, 1994, an account was opened at the Dubai offices of Citibank in the name of Capricorn Trading. The same day, a Citibank deposit slip for the account shows a deposit of $5 million by Mr. Razzak's company, ARY Traders. Two weeks later, another Citibank deposit slip showed that ARY had paid a further $5 million.

In November 1994, Pakistan's Commerce Ministry wrote to Mr. Razzak informing him that he had been granted a license that made him, for at least the next two years, Pakistan's sole authorized gold importer. In an interview in his office in Dubai, Mr. Razzak acknowedged that he had used the license to import more than $500 million in gold into Pakistan, and that he had traveled to Islamabad several times to meet with Ms. Bhutto and Mr. Zardari. But he denied that there had been any secret deal. ''I have not paid a single cent to Zardari,'' he said.

Mr. Razzak offered an unusual explanation for the Citibank documents that showed his company paying the $10 million to Mr. Zardari, suggesting that someone in Pakistan who wished to destroy his reputation had contrived to have his company wrongly identified as the depositor of the money. ''Somebody in the bank has cooperated with my enemies to make false documents,'' he said.

The Documentation
Erasing the Proofs Of Secret Power

The Pakistani investigation of Ms. Bhutto's two terms in office has tied a range of overseas properties to her husband and other family members. Among these are Rockwood, a 355-acre estate south of London, and a $2.5 million country manor in Normandy. The listed owners of the manor, which is known as the House of the White Queen, are Hakim and Zarrin Zardari.

Other properties that Pakistani investigators have linked to members of the Bhutto family include a string of luxury apartments in London. Pakistan has asked the United States Justice Department to investigate still more bank accounts and properties, including a country club and a polo ranch in Palm Beach County, Florida, said to be worth about $4 million, that were bought by associates of Mr. Zardari in the mid-1990's.

The Pakistani request to Washington, made in December, also sought help in checking allegations that some of Mr. Zardari's wealth may have come from Pakistani drug traffickers paying for protection. In the past decade, Pakistan and its neighbor Afghanistan have become the world's largest source of heroin, shipping 250 tons of it every year to Europe and the United States.

The purchase of overseas properties by well-connected members of the elite in a developing country is hardly a new phenomenon. But the disclosures about Ms. Bhutto's family have underscored a trend that international financial officials have long found troubling: the willingness of the monetary fund and the World Bank to prop up economies like Pakistan's that have been bled dry by corruption.

A former high-ranking official of the World Bank in Islamabad who requested anonymity acknowledged that both institutions were all too willing to make additional loans on the vague promise that corruption would be reined in. ''We made a mantra out of the phrase 'good governance,' '' the official said, ''as though we intended to try and stamp the corruption out. But the truth is that we turned a blind eye.''

In the years Ms. Bhutto was in office, Pakistan received billions of dollars in new loans, mostly to enable it to pay interest on its debt. By 1996, interest on the accumulated public debt, including $32 billion in foreign loans, was absorbing nearly 70 percent of state revenues. With Pakistan's defense costs absorbing the remaining 30 percent, scarcely anything was left for the social programs that Ms. Bhutto had promised.

While the Times inquiry confirmed some of the allegations made by the Pakistani investigators, other matters remained unresolved. For example, none of the documents for the foreign bank accounts or offshore companies uncovered thus far bear Ms. Bhutto's name, nor do any of the letters promising payoffs make any mention of her.

The only document that refers to Ms. Bhutto is a handwritten ledger for an account at the Union Bank of Switzerland in Geneva. In Mr. Schlegelmilch's handwriting, the ledger contains the notation ''50% AAZ 50 % BB.'' This account showed deposits of $1.8 million for one 90-day period in 1994 and received at least $860,000 in payments by the two Swiss customs-inspection companies.

Some of Ms. Bhutto's friends say she cannot fairly be held accountable for her husband's questionable deals, since she was too busy as Prime Minister to know of them. Others say Ms. Bhutto, having lost her father and both of her brothers in tragic circumstances, became overdependent emotionally on Mr. Zardari.

Her younger brother, Shahnawaz, died of poisoning in Cannes, France, in 1985 after a dispute that Murtaza Bhutto, her older brother, linked to arguments over family assets stashed in Switzerland. Murtaza Bhutto was killed in September 1986 after a long-running power struggle with his sister and her husband. Mr. Zardari has been charged with masterminding the second murder, but he and Ms. Bhutto say he was framed. Officials say Mr. Zardari made no attempt to disguise his activities from his wife, holding meetings on some of his deals in the Prime Minister's residence, and invoking his wife's authority when ordering officials to override regulations meant to prevent graft in the assignment of contracts.

Furthermore, several senior officials in Ms. Bhutto's Governments said they had met with repeated rebuffs when they tried to warn her about Mr. Zardari. One senior minister said that when he had raised the issue, ''She said, 'How dare you talk to me like that?' and stalked out.''   Nor has Ms. Bhutto made any effort to distance herself from Mr. Zardari. In the Karachi interview, she said her husband's deals had been made only for Pakistan's benefit. ''He's a very generous person,'' she said. ''His weakness, and his strength, is that he's always trying to help people.''

The tax returns filed by Ms. Bhutto and her husband in her years in office give no hint of the wealth uncovered by the Pakistani inquiry. Ms. Bhutto, Mr. Zardari and Nusrat Bhutto declared assets totaling $1.2 million in 1996 and never told authorities of any foreign accounts or properties, as required by law. Mr. Zardari declared no net assets at all in 1990, the year Ms. Bhutto's first term ended, and only $402,000 in 1996.

The family's income tax declarations were similarly modest. The highest income Ms. Bhutto declared was $42,200 in 1996, with $5,110 in tax. In two of her years as Prime Minister, 1993 and 1994, she paid no income tax at all. Mr. Zardari's highest declared income was $13,100, also in 1996, when interest on bank deposits he controlled in Switzerland exceeded that much every week.

Pakistan's inquiry is in its early phases, but it has already prompted international action. Swiss officials have frozen 17 bank accounts belonging to the Bhutto family, and authorities in Britain and France are searching for other accounts and properties. Ms. Bhutto described the investigation as a persecution. At one point she attacked the Clinton Administration, saying it had ignored her plight while deploring the treatment of Daw Aung San Suu Kyi, the Burmese opposition leader and Nobel laureate.

''This is the most horrendous human rights record, what is happening to me, the former Prime Minister of Pakistan,'' Ms. Bhutto said. ''It is shocking to see that the Clinton Administration talks so much about Burma, when this is happening to a woman who leads the opposition here.'' Tears welling in her eyes, she added, ''The Bhuttos have suffered so much for Pakistan.''

Correction: January 10, 1998, Saturday An article yesterday about corruption in Pakistan misstated the year that the brother of former Prime Minister Benazir Bhutto was killed. It was 1996, not 1986. Because of an editing error, the article also referred incompletely to Hakim and Zarrin Zardari, the owners of a manor house in Normandy. They are the parents of Mrs. Bhutto's husband, Asif Ali Zardari, who is the focus of a corruption inquiry.

Correction: January 23, 1998, Friday An article on Jan. 9 about the financial dealings of the family of former Prime Minister Benazir Bhutto of Pakistan referred incorrectly to the holder of a 1990 contract to provide preshipment verification of major imports for the Pakistani Government. The contract signed by Ms. Bhutto's Government was with Cotecna, a Swiss concern, which later became an affiliate of Societe Generale de Surveillance, another Swiss company; S.G.S. was not the holder of the 1990 contract.