A polo drawing by Lawrence Nelson Wilbur (American, 1897-1988), signed, pen & ink on paper, portraying two polo players & ponies competing for the bal

A polo drawing by Lawrence Nelson Wilbur (American, 1897-1988), signed, pen & ink on paper, portraying two polo players & ponies competing for the ball, gallery sheet to the reverse bearing information including UNTITLED (POLO RIDERS II), c.1933, PROVENANCE: ESTATE OF THE ARTIST, 34 by 26.5cm., unmounted & unframed, very good condition