Baring-Gould’s sources: Authority for his life, a fragmentary life of uncertain date, published by Bollandus.

James, of Asiatic origin, and a soldier, was one of the first disciples of S. Honoratus in his monastic settlement at Lerins. When S. Honoratus was appointed Archbishop of Arles, he called James to be the first Bishop of the Tarantaise, the valleys of the Isère and Arc, of which Moutiers is the modern capital, between the Graian and Pennine Alps. S. James made Centronum, or Moutiers, the seat of the bishopric, and there he laboured to convert the people still buried in heathenism. Of him is related a story very similar to that told of other Saints, viz., that as his monks were cutting down trees in the forest, for the construction of his cathedral church, a bear killed one of the oxen which drew the timber. Then the monks fled in consternation to S. James, who went boldly to the bear and said, "I, James, the servant of Christ, command thee, cruel beast, to bow thy stubborn neck to the yoke, in place of the ox thou hast slain." Then the bear was obedient, and drew the timber to the church.

S. James is also said to have taken an ass's load of pure snow of the mountain in mid-summer, as a tribute to Gondecar, King of the Burgundians, having nothing else to offer, when the king had ordered a tax to be levied on all the produce of the land.