“Unidentified boy, seated on park bench, probably in Washington, D.C., holding book,” ca. 1920, by National Photo Company, via Library of Congress Prints and Photographs Division.
I wonder if this isn’t a courtyard or garden corner of a college or university, rather than a park. Behind the boy are two adult coats, as well as books and files and at least one briefcase. Maybe he’s the son of a professor?