Recent years have seen a growing emphasis on modern special collections (in themselves no new phenomenon), with a dichotomy between guidance for detailed cataloguing in Descriptive Cataloging of Rare Materials (Books) (DCRM(B), 2007) and the value of clearing cataloguing backlogs expeditiously. This article describes the De la Mare Family Archive of Walter de la Mare’s Printed Oeuvre at Senate House Library, University of London, as an example of a modern author collection in an institutional library. It sets out the particular cataloguing challenges faced, looking at both general and copy-specific features and discussing the relation between bibliography and catalogue when no comprehensive bibliography exists. It confirms the adequacy of the Anglo American Cataloging Rules (AACR2, 1998) for general cataloguing purposes, while noting the benefit of DCRM(B)’s more expansive copy-specific instructions.