A.J. Russell, 
1862-1863 (taken) 1863 (published), [Railroad construction worker straightening track; pile of twisted rails in background], [Photographs illustrative of operations in construction and transportation, as used to facilitate the movements of the Armies of the Rappahannock, of Virginia, and of the Potomac ...], 
Salted paper print, 
Library of Congress, Prints and Photographs Division, 
LL/46810