The following list names all the separate works John Fisher owned, cited, mentioned or (in a very few cases) clearly alluded to, in the course of his surviving writings. Where possible, suggestions are made as to the precise editions, translations or recensions he used. The fact that Fisher refers to a work is not in itself conclusive proof that he had read, or indeed that he owned, the work in question. We know of cases where he borrowed books from friends, and it is often clear that his citations are drawn indirectly from compilations, such as the Sentences of Peter Lombard, Gratian's Decretum or Thomas Aquinas's Catena Aurea, rather than directly from the originals. Nevertheless, Fisher exhibits a strong sense of the importance of verifying citations and of providing verifiable references. This is implicit in his own common practice of citing by author, title, book and chapter which, moreover, suggests that he worked from originals rather than compilations. The spread of this practice, of course, owed much to printing, which made identical or at least very similar copies of books widely available for the first time. The importance he attached to verification is confirmed by explicit remarks addressed to polemical opponents. In the Eversio Munitionis he criticised Clichtove for taking a text of Theophilus from the Catena Aurea inaccurately and without naming his source. He regularly convicted Oecolampadius of selective and defective quotation. And at one point he lamented that he was unable to verify a passage from Irenaeus because he did not have a copy himself – a lacuna in his collection that he was soon to remedy.