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. 7. George R. West. ‘Chinese Blacksmiths. Macao,’ 1840s. Watercolour.
Caleb Cushing Papers, Manuscript Division, Library of Congress.
See http://gwulo.com/node/35351 for more information.
It is reproduced here with the permission of the author and publisher.
Date picture taken
unknown