Ordeman, John T. "Frank W. Benson's etchings, drypoints and lithographs, an illustrated and descriptive catalogue." Hickok-Bockus, 1994, Summit, New Jersey.
Notes (object):
Trial proof (a). Twelve impressions, on Whatman paper. The land and clouds are indicated in pencil on one of these impressions, and printed on the plate to the serve as a guide in drawing on the plate for etching.