Found:


Vertical Study for Riverside…

anonymous, Frederick Knecht Detwiller, in or after 1926, photomechanical print, RP-P-1931-71

Horizontal Study for Riverside…

anonymous, Frederick Knecht Detwiller, in or after 1926, photomechanical print, RP-P-1931-70

Reproductie van een tekening met…

American Photo-Lithographic Company, after A. Berg, c. 1862 - in or before 1867, photomechanical print, RP-F-2022-43-8-63-10