Royal Armouries Manuscript I.33, also known as the Tower Fechtbuch or the Walpurgis Manuscript, is the oldest known manual of swordsmanship in the Western canon. Dated to c. 1310, it is a stunning work of late medieval art and the Armouries' most treasured manuscript, one so famous it has become known simply by its shelf number: I.33. This new edition includes a critical introduction, transcription and translation by Jeffrey L. Forgeng, the foremost authority on I.33.