While looking in Belgian archives for documentary evidence connected with English cultural life in the late sixteenth and early seventeenth centuries I have come across a handwritten catalogue of books which were once in the possession of the English Jesuit mission established in Saint-Omer. This catalogue, headed Catalogus librorum Missionis Anglicanae Societatis Jesu, qui Duaci in Collegio nostro relicti sunt, is preserved in the Rijksarchief in Ghent. It is written on the first two pages of a sheet folded once and the sheet itself is found in dossier 76, which forms part of a number of documents now classified as Archives des Jésuites. The catalogue lists the titles of 124 books, the authors of which are for the most part not mentioned. An examination of these titles shows that they are mostly concerned with attacking the considerable body of anti-Catholic legislation passed by Parliament in the wake of the Gunpowder Plot of November 1605, as well as with arguing against the defenders of the Oath of Allegiance. In the article mentioned below it was shown that the Catalogus librorum was compiled in December 1618 or in the course of the year 1619, at a time when difficulties had arisen between the English Jesuits and Matthew Kellison, who was president of the English College of Douay from 1613 to 1641. With very few exceptions the books listed in the catalogue are of a devotional or a controversial nature.