Description of the artwork «Sibyl with a clean Board»
Presumably a sketch of the figure of Arachne to the painting "the Spinners, or the Myth of Arachne" or a picture of the sibyl
(C) https://ru.wikipedia.org/wiki/%D0%A1%D0%BF%D0%B8%D1%81%D0%BE%D0%BA_%D0%BA%D0%B0%D1%80%D1%82%D0%B8%D0%BD_%D0%94%D0%B8%D0%B5%D0%B3%D0%BE_%D0%92%D0%B5%D0%BB%D0%B0%D1%81%D0%BA%D0%B5%D1%81%D0%B0#cite_note-318