4 x 5 1/2 in. cabinet photograph on cardstock mount (toning, several stray markings, wear to mount, modern adhesive remnants and surface loss to verso). Uncredited yet identical pose to Plate 42 (cat #98) in Picturing Frederick Douglass, which is a CDV by George Kendall Warren, ca 1879. Warren was active in Massachusetts from 1851-1881, based in Lowell until moving to Boston in 1870. His Washington Street studio opened in 1872, and he specialized in college class photos and portraits of famous figures. (Picturing Frederick Douglass: An Illustrated Biography of the Nineteenth Century's Most Photographed American. New York: Liveright Publishing Corporation, 2015)