Crowe and Cavalcaselle, vol. i., Appendix, p. 451.
The idea of painting St. Jerome by moonlight was not a new one. In the house at Venice of Andrea Odoni, the dilettante whose famous portrait by Lotto is at Hampton Court, the Anonimo (Marcantonio Michiel) saw, in 1532, "St. Jerome seated naked in a desert landscape by moonlight, by —— (sic), copied from a canvas by Zorzi da Castelfranco (Giorgione)."
See "The Picture Gallery of Charles I.," The Portfolio, January 1896, pp. 49 and 99.