VI INTRODUCTION. 3. A MS. in the Cambridge University Library, No. 2023 ff. 169 — 294. I regret that I only knew of the existence of this MS. on the publication of the Catalogue a year ago, and as I had at that time 104 pages of my work printed, I have given a collation of its first chapters in the Appendix. 4. A portion of the Malabar MS. (Cambridge Oo. i. 2. ff.) deciphered and published by the Rev. J. P. Arendzen, Ph.D., in the Journal of Theological Studies for October 1901, with the help of photographs of the Mosul Codex, furnished to him by Monsignor Rahmani, Uniat Patriarch of Antioch; these two MSS. being found by Dr Arendzen to be practically identical. This consists of the " Teaching of the Twelve Apostles." 5. A MS. in the Museo Borgia, of which I have been kindly furnished with a collation by M. le Professeur Nau, of Paris, and with photographs by Monseigneur Graffm. This MS. is inferior to Codex Sangermanensis. Prof. Edmund Hauler published two years ago at Leipzig fragments of a Latin translation of the Didascalia from a palimpsest at Verona, of the fourth century. The upper writing of the MS. belongs to the eighth century, and contains the Sentences of Isidore of Seville. The decipherment of the lower script must have been a trying and laborious work, and it is eminently satisfactory to find such a close agreement between the Latin and the Syriac. Last year, also, a translation into French appeared by M. le Pro- fesseur F. Nau, of the Catholic College in Paris, published seriatim in the Canoniste Contemporain, and now republished in a separate form. I have compared M. Nau's translation with my own, and in very few points indeed have I ventured to differ from him. His accuracy and penetration are beyond praise. I desire once more to thank him for his collation of Codex Borgia ; and my gratitude is due also to Monseigneur Graffm for the photographs of that MS.; to Dr Eberhard Nestle of Maulbronn, and to my sister, Mrs Lewis, for their assistance in the revision of my proofs ; and to the readers and printers of the University Press, for the care with which they have executed their troublesome work. M. D. G.