This artist is identified only by the initials "O. G." in the inscription of the National Gallery's very crudely painted hunting scene, Retriever (1953.5.96). No other works by the artist, active in the second half of the nineteenth century, are known. [This is an edited version of the artist's biography published, or to be published, in the NGA Systematic Catalogue]
Chotner, Deborah, with contributions by Julie Aronson, Sarah D. Cash, and Laurie Weitzenkorn. American Naive Paintings. The Collections of the National Gallery of Art Systematic Catalogue. Washington, D.C., 1992: 140.