7 3/4 x 10 3/4 in. (19.7 x 27.3 cm)
Framed: 15 x 17 3/4 in. (38.1 x 45.1 cm)
Collection of the U.S. House of Representatives
The 1857 Capitol extension included room for a Members’ post office. Genteel visitors stroll through the grand space, constructed with masonry vaults and fire-proof cast iron trim. The post office remained in this room until 1870, when the Committee on Ways and Means moved into the space.