Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
1865. "Charleston, South Carolina. Breach patched with gabions on the north wall of Fort Sumter." From photographs of the Federal Navy, and seaborne expeditions against the Atlantic Coast of the Confederacy, 1863-1865. Wet collodion glass plate negative, right half of stereograph pair, from Civil War photographs compiled by Hirst Milhollen and Donald Mugridge. View full size.