La Croze (Christianisme des Indes, tom. i. p.
44 - 53. Thesaurus Epistolicus, La Crozianus, tom. iii. p. 276 - 280) has detected the use of and
which, in the ivth, vth,
and vith centuries, discriminates the school of Diodorus of Tarsus and his Nestorian disciples.