This sketch is to be found in Van Dyck's note-book, now in possession of the Duke of Devonshire at Chatsworth. It is here reproduced, failing an illustration of the original picture, which the authorities in Venice decline to have made. (A good reproduction has now (1903) been made by Anderson of Rome.)
Archivio Storico, vi. 409.
Ridolfi tells us Giorgione painted, among a long list of decorative pieces, "The Birth of Adonis," "Venus and Adonis embracing," and "Adonis killed by the Boar." It is possible he was alluding to these very cassone panels.