| John Plumbe Jr. [United States Patent Office, Washington, D.C., showing F Street facade, possibly taken from the upper floor of the General Post Office] 1846 (ca) Daguerreotype, 1/2 plate Library of Congress, Prints and Photographs Division Purchase; 1972; (DLC/PP-1972:R01.1) CALL NUMBER: DAG no. 1229 LL/42148
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