Diane Tough, Head of Cataloguing at the Natural History Museum Library, talked about recent developments in the methods of collection description at the Museum. The Library is one of the foremost resources for researchers in molecular biology, biodiversity, systematics, taxonomy, and the history of science, and consists of over one million books and half a million artworks. Its extensive collections consist not only of current documentation, but also of older material representing a vital source for the study of both biodiversity and early printed scientific books.