Embassy and Presents from the Indians
About this time ambassadors from the Indians, who inhabit the distant regions of the East, arrived with presents consisting of many varieties of brilliant precious stones, and animals differing in species from those known to us. These offerings they presented to the emperor, thus allowing that his sovereignty extended even to the Indian Ocean, and that the princes of their country, who rendered homage to him both by paintings and statues, acknowledged his imperial and paramount authority. Thus the Eastern Indians now submitted to his sway, as the Britons of the Western Ocean had done at the commencement of his reign.
Source: Life of Constantine (New Advent)