According to Indian Christian traditions, the Apostle Thomas arrived in Malabar Coast presently in the Indian state of Kerala in Kodungallur, established the Seven Churches and evangelised in present-day Kerala and Tamil Nadu. A historically more likely claim by Eusebius of Caesarea is that Pantaenus, the head of the Christian exegetical school in Alexandria, Egypt went to India during the reign of the Emperor Commodus and found Christians already living in India using a version of the Gospel of Matthew with "Hebrew letters, a mixture of culture." This is a plausible reference to the earliest Indian churches which are known to have used the Syriac (a dialect of Aramaic) New Testament. Pantaenus' evidence thus indicates that Syriac-speaking Christians had already evangelised parts of India by the late 2nd century.