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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.

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20 December 1862

Platt, E.R., fl. 1862

Document

Title: General Orders No. 28

One document signed by E.R. Platt granting a leave of absence for 20 days to Capt. J.S. Cary and Private Putnam dated December 20, 1862.

GLC03393.66

27 October 1862

Platt, E.R., fl. 1862

Letter

Title: to Henry Jackson Hunt

United States Military Telegram. Inability to report until division reports come in. Platt was an artillery officer.

GLC02382.008

27 November 1862

Platt, E.R., fl. 1862

Autograph document signed

Title: Honorable discharge of O. S. Dewey

Officially gives Orville Dewey an honorable discharge from the military.

GLC02161.069

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