Inscribed at left center of design area, in pen and black ink, "Trinkwasser"(?); and at lower right, "Das Bild Im Helldunkel zu halten", and stamped, "Piglhein". Inscribed at lower left of sheet, on attached piece of same type of paper, in graphite, "Piglhein E.U.B. 1848-1894 Hamburg-München".
Ryskamp, Charles, ed. Twentieth Report to the Fellows of the Pierpont Morgan Library, 1981-1983. New York : Pierpont Morgan Library, 1984, p. 288.