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.
Vintage photos of:
February 1864. Brandy Station, Virginia. Secret Service officers at Army of the Potomac winter headquarters: Col. George H. Sharpe, John G. Babcock, unidentified and Lt. Col. John McEntee. 8x10 glass-plate negative from a collection compiled by Hirst Milhollen and Donald Mugridge. View full size. Alternate caption information, which records the date of creation/publication as August 1863: "Bealeton, Va. Members of the Bureau of Military Information."