Comparable to a drawing with an 18th Century attribution to Zilotti in Budapest, I. Fenyö and G. Fiocco, Disegni Veneti del Museo di Budapest, Venice, 1965, no. 59, illustrated. Three similar studies were sold at Christie's, London, 26 June 1974, lots 55-7, and one on 5 July 1994, lot 56, illustrated.