The literary history of the legend of St. Catherine of Alexandria, although it has already been more or less elaborately studied in various quarters, notably in the Geschichte der heiligen Katharina von Alexandrien of the late Hermann Knust (Halle, 1890), still awaits the accurate and thoroughgoing treatment it deserves. My attention was called to the hitherto unpublished version which follows, by the account given of it by M. Paul Meyer, in the Notices et Extraits des mss. de la Bibliothèque Nationale, tome 33, 1re partie (Paris, 1888), in his study Sur deux anciens manuscrits français ayant appartenu au marquis de la Clayette (tirage à part, pp. 61-64). Several years ago I made a copy of this unique version in the National Library at Paris. Having since been unable to control the widely scattered material essential to a proper discussion of the problems involved in the St. Catherine legend, I have decided to publish, without further delay, the text of the Clayette version, offering it to scholars for further utilization, as a not uninteresting literary and linguistic document.