Anne Wilson Goldthwaite (American, 1869 - 1944), lithograph on paper print of a Black American boy riding a mule, signed "Anne Goldthwaite" in pencil lower-right corner. Site size 10" x 11 /12" mounted in 19" x 22" double matte with gold-leaf frame 22" x 25"
To learn more about this influential female artist, see her Wikipedia article here. Also, to view works by Ms. Goldthwaite held by the Smithsonian American Art Museum--including the lithograph for sale here--see her listing in that prestigious museum.