His last scientific publication was "British Conchology" (1778) which included an autobiographical preface. He was also an authority on conchology. Say has been called the father of American descriptive entomology and American conchology. In his leisure, John Fothergill made a study of conchology and botany. Iredale was originally appointed to assist Joyce Allan, the temporary head of the Conchology department. Thereafter, Pilsbry continued as editor of the ongoing multi-volume "Manual of Conchology". Sylvanus Hanley inherited a fortune, which enabled him to devote a lifetime to conchology. The chance purchase of some shells led to a lifelong interest in conchology. One division of malacology, conchology, is devoted to the study of mollusk shells. "Manual of Conchology, structural and systematic, with illustrations of the species". The study of mollusc shells is known as conchology. Conchology (from "konkhos", "cockle") is the study of mollusc shells. Wyatt's original book, "Manual of Conchology", had been published by Harper & Brothers. He is credited (at title page) in "Manual of Conchology" since volume 12 from 1890. The study of dry mollusc shells is called conchology as distinct from malacology (wet specimens).