The original edition of this catalogue raisonné was published in 1977. This revised edition was issued in 1983 (reprinted in 1994 without updates). For this second edition, information on listed works has been brought up to date. Changes of location are noted for works from private to public collections, but not for changes between private collections. The works are listed as far as possible in chronological order (with help from the registers of the Galleria Il Milione). The text includes photographs documenting the artist in his studio, the landscapes he worked from, and images of his paintings in situ.