Johannes Gerardus Keulemans (1842-1912) contributed artwork to the PROCEEDINGS OF THE ZOOLOGICAL SOCIETY) (PZS). This page is a hand-colored lithograph from that publication. The page measures 9"' x 6 1/2". The top is marked P.Z.S. 1874 PL LXVIII The bottom is marked showed J. G. Keulemans as the lithographer and Mintern Bross. as the printer. The bird latin names are 1 & 2) CERCHNEIS RUPICOLA and 3) cerchneis tinnunculus. This print is in excellent condition and would be lovely framed.