Amassed over a forty-year career, first with the East India Company in Sumatra and later with the Admiralty as its First Secretary, William Marsden’s library, as revealed in this catalogue of 1827, was an invaluable collection. An expert in Asian languages, Marsden (1754-1836) published his catalogue to provide a basis for study into comparative linguistics and oriental literature. This work provides an insight into both the practice of book-collecting in the period, and the variety of works published throughout the world. It lists texts on travel, medicine and linguistics, as well as works of literature and religion, including some extremely rare Bibles, and a possibly unique copy of the Book of Genesis in the Algonquin language. The library itself was donated to King’s College, London, in 1835 and is now shared by King’s College and the School of Oriental and African Studies at the University of London.