[Footnote 40: Maurice himself composed xii books on the military art, which are still extant, and have been published (Upsal, 1664) by John Schaeffer, at the end of the Tactics of Arrian, (Fabricius, Bibliot Graeca, l. iv. c. 8, tom. iii. p. 278,) who promises to speak more fully of his work in its proper place.]