This image previously appeared in Terry Bennett's "History of Photography in China 1842–1860", published by Bernard Quaritch in 2009, with the caption:
Fig. 6. Engraving of an ambrotype photograph of George R. West by Mathew
Brady published in Frank Leslie’s Illustrated Newspaper, 16th February 1856
(p.158). Author’s Collection.
See http://gwulo.com/node/35351 for more information.
It is reproduced here with the permission of the author and publisher.