The catalogues raisonnés of the paintings and the drawings and watercolors are arranged chronologically. There are also separate catalogues of pictures of unknown medium and addenda. The catalogue lists 127 authentic paintings and 1219 drawings by the artist. The appendix contain a list of exhibitions with a list of the works shown, with reprints of essays from the exhibition catalogues. Documents include lists of works and notes by the artist, and information on Lewis' works sold from the Crossland Collection in 1956.