This is a detail from Squire J. Vickers from 1927 titled "Cityscape With Sun". Its done on burlap giving it a rich texture of fabric. He was the chief designing architect of the NY City subway system until 1942 and was included in the 1913 Armory Show.
I also became interested in how hands were depicted in several paintings. This is a detail from George Luks, "The Musician" that's undated.
This is painted by Randall Davey circa 1920-25 titled "Portrait of Paul Robeson". Davey was a contemporary of John Sloan, Edward Hopper and George Bellows.