| A.J. Russell Second experiment with board trusses [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 ...] 1863 (published) Salted paper print 28 x 29 cm Library of Congress, Prints and Photographs Division Call Number: LOT 9209 (H) (M) [P&P], LC-DIG-ppmsca-10353 (digital file from original photo, front) LC-DIG-ppmsca-10354 (digital file from original photo, back) LC-B8184-10510 (b&w film copy neg.) LL/46830 Boston : Wright & Potter Printers, 1863.
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