The literary genetics of Shaw's most famous play are here examined for the first time. The sources of Saint Joan are closely compared with the original shorthand manuscript and that is compared with its subsequent revisions. This evidence is supplemented by facts drawn from Shaw's correspondence in print, in the British Library, and in private collections, and by accounts both in print and in the correspondence of people who knew Shaw at the time of his writing Saint Joan. The manuscript and its revisions are examined in the light of all that has been written about the play since it first...