See Jones, Arun, "Christianity in South Asia" in Farhadian (ed.), Introducing World Christianity (Blackwell Publishing, 2012), p. 93. For a more thorough treatment of the topic which affirms Jones' claims, and for the use of Syriac, see Frykenberg, Robert Eric, Christianity in India: From Beginnings to the Present (Oxford University Press, 2008). See also the earlier Neill, Stephen, A History of Christianity in India (Cambridge University Press, 1984), pp. 48–49. Neill takes it as certain that Christianity was established in India by the 6th century and also affirms the possibility of the St. Thomas tradition being true.
"Pantaenus ... is said to have gone to India. It is reported that among persons there who knew of Christ, he found the Gospel according to Matthew, which had anticipated his own arrival. For Bartholomew, one of the Apostles, had preached to them, and left with them the writing of Matthew in the Hebrew language, which they had preserved till that time" (versione inglese di Eusebio, Historia Ecclesiastica, V, x, 3
