Antique Classroom Photo with Nun and Dog Drawing on Blackboard, Mounted

I really love the combination here of the huge dog drawn on the chalkboard and the sort of hunch-shouldered nun in her full habit to its right--and would like to think that when the classroom was empty she took great pleasure in drawing all sorts of things! Great details here of desks and ferns and various (mostly holy) things hanging on the walls, and best of all a wonderful field of faces, to various extents turned to face the camera. 

7 1/2" x 5 3/4", good condition with some scattered toning spots, mounted to board.