[Halftones from photographs of the U.S. Patent Office Building in An account of the destruction by fire of the north and
Walker, Lewis E. (Lewis Emory)[Halftones from photographs of the U.S. Patent Office Building in An account of the destruction by fire of the north and west halls of the model room in the United States Patent Office Building, on the 24th of September, 1877]. Page no. 34[A]: Roof of the the U.S. Patent Office Building, corner of Seventh and G Streets, as it appeared on the morning after the fire of September 24, 1877 / copied from a photograph by L.E. Walker, Heliotype Printing Co., 220 Devonshire Street, Boston. Halftone. 28 x 19 cm.