Not signed or dated however...

See blog post: http://duphineysfacesofri.blogspot.com/2011/02/old-friend-found-among-unknown-faces.html

AND, update 4/1/2011, just found this drawing in a photo of my grandgather's studio! http://duphineysfacesofri.blogspot.com/2010/12/in-his-fleur-de-lys-studio.html