License, verbatimPD
The National Gallery of Art: open access image with no usage restrictions under the NGA's open access policy (openaccess=1 in the Gallery's published_images dataset).
Jean-Louis Forain. a) Scène de grève (3e planche) (Scene of a Strike) (third plate) (recto); b) Untitled (verso), c. 1897. National Gallery of Art, Washington.