Original Source: Baron Raimund von Stillfried, [Ainu Men], c. 1874-1876. Hand-colored albumen photograph.
The example above is a hand-colored albumen photograph located in Museum Volkenkunde. The museum identifies Wilhelm Joest as the photographer, but other scholars of photography have consistently attributed the photograph to Stillfried.
Discussed in the following chapter: Spiker, Christina M. “‘Civilized’ Men and ‘Superstitious’ Women: Visualizing the Hokkaido Ainu in Isabella Bird’s Unbeaten Tracks, 1880.” In Gender, Continuity, and the Shaping of Modernity in the Arts of East Asia, 16th–20th Centuries, edited by Lara Blanchard and Kristen Chiem, 287-315. Leiden: Brill, 2017.