This is a second revised edition of the author's original study, first published in 1955. The catalogue raisonné is chronological, and includes paintings and etchings, plus a few comparative drawings; it lists authenticated works, studies, plus drawings not related to known compositions, lost paintings, and erroneous attributions. The unknown works are those listed by Bellori or contemporary sources (later attributions appear in another part of the catalogue,) replicas and copies are mentioned.