Subjects: Nashville & Chattanooga Railroad Company, Blockhouses, Tennessee, Chattanooga, Railroads, Chattanooga, Battle Of, Chattanooga, Tenn., United States, History, Civil War, Military Facilities, Transportation, Albumen Prints
Collection: United States Library of Congress: Stereoviews

Subjects: Nashville & Chattanooga Railroad Company, Blockhouses, Tennessee, Chattanooga, Railroads, Chattanooga, Battle Of, Chattanooga, Tenn., United States, History, Civil War, Military Facilities, Transportation, Albumen Prints
Collection: United States Library of Congress: Stereoviews

Subjects: North Dakota, Blockhouses, Dakota Territory
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]

Subjects: California, Blockhouses, Columbia River Gorge (Or. and Wash.)
Collection: NYPL Digital Collections: Robert N. Dennis [From The New York Public Library]