Statistics for occurrence #1 of “in Washington, D. C.” in entry corcoran-william-wilson of Harper's Encyclopedia of United States History:
...Philanthropist; born in Georgetown, D. C., Dec. 27, 1798; educated at Georgetown College; became a banker in Washington in 1837; and retired in 1854.
He was the founder of the Corcoran Art Gallery, in Washington, D. C. , to which he gave a large endowment.
His contributions to public and private charities are said to have aggregated more than $5,000,000. He died in Washington, D. C., Feb. 24, 1888.
...