across bottom in ball-point pen below image: A Merry Christmas and a Happy / New Year 1962 / MCEscher (underlined); lower center in plate: '61 / MCE
- Bool, F.H. et al. M.C. Escher: His Life and Complete Graphic Work. Amsterdam: Meulenhoff, 1981; English-language edition, New York: Harry N. Abrams, 1982.