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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.

Sadelmayer, Jacobo, fl. 1747-1751 to Juan A. Balthasar (in Spanish)

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Gilder Lehrman Collection #: GLC06289 Author/Creator: Sadelmayer, Jacobo, fl. 1747-1751 Place Written: s.l. Type: Autograph letter signed Date: 20 March 1747 Pagination: 5 p. : Height: 30.6 cm, Width: 21 cm Order a Copy

Need to establish five new missions in Primeria Alta, California and parts of Mexico and Arizona. Evaluation of likely places, information on local Indians and settlers, past problems and possible future complications.

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