Linoleum cut in black and gray-brown, printed from two blocks on thin Japan paper, 1950. Signed in pencil, inscribed 'eigen druk', Directly bought from the artist in 1962, copy of the original letter written by Escher accompanied with this lot. Escher self wrote about this print: “Two raindrops fall into a pond and, with the concentric expanding ripples that they cause, disturb the still reflection of a tree with the moon behind it. The rings shown in perspective afford the only means whereby the receding surface of the water is indicated.’ (Graphic prints and drawings by M.C.Escher). The sky is a lovely grey-brown colour. The colour of the ink and the pressure Escher applied with his bone egg spoon as he produced one print after another would undoubtedly have meant that each print had subtle and unique variations in colour. Prints are meant to be identical, but there are always slight differences in Escher’s prints because of the care with which he applied pressure with the little spoon.