James Smithson never set foot in the United States, yet in 1826 he made it his residuary heir in a single sentence that gave no reason; the gold arrived twelve years later in 105 sacks, and Congress then sat on it for eight years

James Smithson signed his will in London on October 23, 1826, in rented rooms on Bentinck Street. It was short, and it disposed of a fortune in bank stock. Nearly all of it went to a nephew.

The clause that made him famous is the one nobody expected to need.

If the nephew died without children, the whole estate was to pass "to the United States of America, to found at Washington, under the name of the Smithsonian Institution, an Establishment for the increase & diffusion of knowledge among men." Smithson had never crossed the Atlantic, and he died in Genoa on June 27, 1829, without adding a word of explanation.

Who James Smithson was

He was born in Paris around 1765 and christened Jacques-Louis Macie, the illegitimate son of Elizabeth Hungerford Keate Macie, a rich widow from Bath, and of Sir Hugh Smithson, shortly to become the first Duke of Northumberland. His father never acknowledged him, and an illegitimate son then inherited nothing and could hold no title. Smithson (naturalized as James Louis Macie, and taking his father's surname only in 1801, after his mother died) spent his life with money and without standing.

The compensation he chose was science. Henry Cavendish nominated him to the Royal Society and he was elected on April 26, 1787, at roughly twenty-two. He published 27 papers, the best of them on calamine: the ore sold under that name turned out to be two different zinc minerals. In 1832 the French mineralogist François Sulpice Beudant renamed one of them smithsonite.

He also kept score. "The best blood of England flows in my veins," he wrote; "on my father's side I am a Northumberland, on my mother's I am related to kings, but this avails me not." Elsewhere he predicted that his name would live on when the titles of the Northumberlands and the Percys were extinct and forgotten.

Hold on to that second remark. It is the closest thing to a motive anyone has.

What happened to the nephew

The nephew was Henry James Dickinson, son of Smithson's half-brother Colonel Henry Louis Dickinson and a Frenchwoman, Mary Ann de la Batut. The will made him take the Hungerford name, which he did, and he went about the continent styling himself Baron de la Batut on no authority anyone has traced. He died at Pisa on June 5, 1835, unmarried and childless, in his twenties.

Aaron Vail, the American chargé d'affaires in London, sent word that summer. Andrew Jackson passed it to Congress in December, saying he had no authority to accept anything.

Why Congress spent years refusing a gift

The objection was constitutional, and John C. Calhoun made it hardest. Nothing in the enumerated powers let the federal government take a private legacy from a foreigner, he told the Senate in February 1836, and accepting one would send the United States into an English court as a suitor. One South Carolina member thought Smithson was buying everlasting fame too cheaply.

The Judiciary Committee found a way through: Congress could act as parens patriae for the District of Columbia, which the Constitution did place under its authority. On July 1, 1836, it accepted the legacy and sent an agent to collect.

Richard Rush went, expecting the Court of Chancery to eat the rest of his career. His letters to Secretary of State John Forsyth complain about the fees and the clerks at every stage. The court found for the United States in May 1838, which by Chancery standards was indecent haste.

The 105 sacks

Rush converted the estate into gold, the safest thing to put on a ship. He bought 104,960 sovereigns, packed them into 105 sacks, and sailed on the packet Mediator with Smithson's mineral cabinet, his library and his personal papers in the hold. The coin went to the Philadelphia mint and came out as American money: $508,318.46.

Congress lent the fund to the states at interest, mostly to Arkansas, and Arkansas defaulted.

That is where the whole thing nearly died, and John Quincy Adams is the reason it did not. Out of the presidency and into the House, chairing the committee on the bequest, he spent years forcing the Treasury to make the fund whole with interest. He wanted it spent on an astronomical observatory, a "lighthouse of the skies" he had argued for since his own administration. He did not get it.

What Congress decided it was for

Everyone had a plan. Rufus Choate of Massachusetts pressed for a great national library; others wanted a national university, or a school for training teachers. Robert Dale Owen of Indiana opened House debate on his bill on April 22, 1846, and the act James K. Polk signed that August 10 gave nearly every faction a piece of one building: a museum, a chemical laboratory, an art gallery, lecture rooms and a library.

Joseph Henry, the Princeton physicist who became first Secretary that December, thought the building was a blunder. "The worth and importance of the Institution is not to be estimated by what it accumulates within the walls of its building," he wrote, "but by what it sends forth to the world." His Programme of Organization, adopted on December 13, 1847, put the income into original research and the printing of it, and he resisted the museum for thirty years. James Renwick Jr. won the design competition anyway, and his towered pile of Seneca red sandstone went up between 1847 and 1855.

Henry was wrong, and the six words he was defending are what prove it. Increase is what a journal does. Diffusion is the harder half, and a free hall on the Mall has always done it better than a monograph could.

Why nobody can say what Smithson was thinking

On January 24, 1865, a stove pipe in the Castle's picture gallery turned out to have been run into an air chamber in the wall rather than a flue, with a coal fire under it for eight days. The blaze took the upper story: Smithson's papers and personal effects, his mineral collection, Henry's own correspondence, and nearly all of John Mix Stanley's two hundred portraits of Native Americans. Mary Henry, the Secretary's daughter, was told she had five minutes to save her property.

So the record on motive is thin, and it is worth saying so plainly. The illegitimacy theory rests on a handful of surviving quotations and on what later biographers have reassembled from European archives. It is a good inference. It is not a documented fact, and the papers that might have settled it burned.

The argument has not ended

The Institution today runs 21 museums, 21 libraries, 14 research centers and the National Zoo, holding some 157 million objects. Admission is free everywhere except Cooper Hewitt in New York. Around 62 percent of a budget near $1.08 billion is federal appropriation and the rest trust funds, which is why the founding argument keeps restarting.

It restarted in 2025. An executive order that March directed the removal of what it called improper ideology from the Institution's offerings, and in August the White House demanded an internal review of eight museums. A 162-page report published on July 4, 2026, Saving America's Story, faulted the National Museum of American History for underplaying the founders; Secretary Lonnie G. Bunch III answered that it was "not a fair characterization" of the museum's work, and that the Institution remains grounded in "scholarship, nonpartisanship, independence, accuracy and integrity."

Smithson wrote a charter of six words and left everything else blank. Every generation since has had to fill it in, and the present one is doing so in public, with the 250th anniversary running and the Castle open again for a summer. Whoever writes the next answer will be arguing about the same sentence.

Sources

• American Heritage, "Smithson and the Smithsonian" (December 1963), for Smithson's parentage, the Chancery suit and the congressional fight
• 1911 Encyclopædia Britannica, "Smithsonian Institution," via Wikisource, for the mint figure and the 1846 act
• Wikipedia, "James Smithson," "Smithsonian Institution," "Smithsonian Institution Building" and "Joseph Henry"
• We're History, "The Strange Career of the Smithsonian Institution," on the rival proposals of the 1830s and 1840s
• Geri Walton, "Smithsonian Institute Fire: An 1865 Tragedy," which quotes the Board of Regents report and Mary Henry's diary
• NPR, "Smithsonian chief emphasizes 'accuracy and integrity' after White House report" (July 9, 2026), on the 2026 report and Lonnie Bunch's reply