"Entered according to the Act of Congress in the year 1856, by Casimir Bohn, in the Clerks Office of the District Court, of the District of Columbia." Gift; Alan M. Voorhees; LC Panoramic maps (2nd ed.), 953.2 Available also through the Library of Congress Web site as a raster image. Acquisitions control no. 95-37 Vault
E. Sachse &amp; Co.; Bohn, Casimir
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