205x175mm. i+24 pp (p. 16 artificially shortened). Dated on cover and on p. 1. The cover initialed W.P.O.; the author’s name on p. 1. Presented to the Library by the author’s son Professor C. W. Previté-Orton, formerly Librarian of the College, 1938.

Autograph with many corrections, additions and cancellations. Not bound. Paper, some sheets torn and frayed. Formerly pinned by butterfly clips.