Arthur Keller (1866-1924) was an American illustrator who studied at the National Academy and the Munich Academy. In 1920 he gathered up his preliminary studies from the costumed model, photographed them on glass negatives, and produced two portfolios of 11x13 inch plates.
According to an Oct. 20, 1920 New York Times review, the portfolios were popular with art students and fellow illustrators because they gave “an opportunity for the public to know a competent illustrator in his moments of preparation, of direct and prompt notation, the salient features of his subject emphasized, a gesture, expression or pose given the importance it has to an artist concentrating his attention upon the significant elements of a composition.”
Related GJ post on working from costumed models, link.
Biography of Arthur Keller on Jim Vadeboncoeur's BPIB, link.
Thanks to Steven Kloepfer and Barry Klugerman