These covered a wide range of topics from bibliography to plant nomenclature, taxonomy and garden plants, with a particular emphasis on Vinca, Epimedium and Lilium.[83] Within two years of joining the library in 1933, he had produced his first major monograph, Lilies (1935),[84] in collaboration with Drysdale Woodcock and John Coutts.[56][lower-alpha 12] This text, in an expanded and revised edition, as Woodcock and Stearn's Lilies of the World (1950)[87] became a standard work on the Liliaceae sensu lato.[56] While at the library he also continued his collaboration with his Cambridge colleagues, publishing catalogues of the Herbarium collections,[88] including the Catalogue of the Collections of the Herbarium of the University Botany School, Cambridge (1935).[89] The second task imposed on him at this time involved the RHS role in maintaining revision of the Code of Botanical Nomenclature (see Botanical taxonomy).