So long ago as 1857, Dr de Lagarde expressed the opinion that the Didascalia had its origin amongst the heretical sect of the Audseans. Dr Zahn, in the Neue kirchl. Zeitschrift, n (1900) p. 498 f., has the same idea with regard to that cognate work, the Testamentum D. N. J. C., which has been lately edited by the Patriarch Rahmani. See also the statement of St Epiphanius quoted by Nau (La Didascalie, pp. 112, 162).