Our Collection

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.

Diamond, Sidney (1922-1945) to Estelle Spero

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Gilder Lehrman Collection #: GLC09120.018 Author/Creator: Diamond, Sidney (1922-1945) Place Written: Edgewood, Arsenal, Maryland Type: Autograph letter signed Date: Circa. May 1942 Pagination: 8 p. ; 18.5 x 27 cm. Order a Copy

Discusses chemical warfare and outlines the day's program of events.

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