License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Anonymous, British, 19th century. Our Manoeuvres – Captain of Skirmishers Addresses a Lance-Corporal (recto); Sad, But a Fact! (verso), September 20, 1873. The Metropolitan Museum of Art.