The statement that masks were not introduced on the Roman stage until after the time of Terence is still repeated by editors (e.g. Menaechmi, Thoresby Jones, 1918, p. 19; Menaechmi, Moseley aria Hammond, 1933, p. 19) and has the support of Pauly Wissowa (Bieber, s.v. ‘Maske’, 1930) as well as Daremberg and Saglio (Navarre, s.v. histrio); it may, in fact, be regarded as generally accepted. Yet so long ago as 1912 A. S. F. Gow (J.R.S. ii. 65–77) put forward strong arguments on the opposite side; his article, though mentioned with respect in Bursian (1936, pp. 51 ff.) and referred to by Schanz-Hosius (i. 149), has not yet been satisfactorily answered, so far as I am aware. Gow did not claim that a final solution of this problem could be attained on our present evidence, but he did show that the orthodox position is open to attack. I hope to prove that the arguments in favour of the early use of masks are even stronger than he claimed.