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At the Institute’s core is the Gilder Lehrman Collection, one of the great archives in American history. More than 85,000 items cover five hundred years of American history, from Columbus’s 1493 letter describing the New World through the end of the twentieth century.

Van Cortlandt, Augustus (1728-1823) [Authorizing Thomas MacDonogh of London with power of attorney for the executors of Roper Dawson's estate]

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Gilder Lehrman Collection #: GLC01450.610.03 Author/Creator: Van Cortlandt, Augustus (1728-1823) Place Written: New York, New York Type: Manuscript document signed Date: 10 July 1781 Pagination: 2 p. : docket ; 24.8 x 37.8 cm. Order a Copy

Van Cortland, and his fellow executors, Rachel Dawson and George Barnes, authorize Thomas MacDonogh to take legal action against John Thorton, a London merchant, to recover Roper Dawson's property. WItnessed by Van Cortland and certified (but not signed) by David Matthews, the mayor of New York City. Docketed the same day as the letter states.

Van Cortlandt, Augustus, 1728-1823
Dawson, Roper, 1724-?

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