4to (220 x 166 mm). 221pp., in French, in ink, with numerous hand-drawn figures in-text, several vignettes on separate slips pasted in; a portion of the title-page written on a separate slip pasted in. (Small hole on title affecting letters, Loss on p.9 affecting 4 lines of text, some minor soiling.) Contemporary calf gilt (joints starting, some light wear). Provenance: M. Besnard (stamp, 3 typescript pages tipped in at front dated 1943). 

Montegu copies the text of Géométrie royalle, divisée en deux parties, qui contiennent tout ce que cet art a de plus nécessaire à un Homme de Guerre... published by Bouchard. He reproduces part of the title-page, and includes a note that he has enriched the text with several illustrations of Euclid.  Montegu wrote the manuscript in 1701, after taking a course taught by M. Flamuel at Metz in 1677-1678.  He includes and 11pp. preamble, not found in the published work, including a definition of mathematics, logistics, arithmetic, and geometry. The main body of the text includes a nearly word-for-word copy of the scarce printed text. The author includes a number of very fine hand-drawn vignettes which complement the manuscript.