c.1864
A government clerk remembered them
In the mission's returns for about 1864 a British district manual counted three convents in the whole Jesuit mission of Tinnevelly: one at Tuticorin, one at Adeikalapuram, and “A Convent for Native Nuns at Vadakankulam.” It was the only one away from the fishery coast. There were seventeen Indian sisters in the whole mission and twelve European ones, and a house of the Indian sisters stood here, inland, while the great church was still a building site. They were not yet an order: the mission had been gathering Indian women into religious life since 1859, but did not constitute them as a congregation until 1876, so the sisters in this village belonged to those patient years before there was a rule to profess. No parish paper remembers them. A government clerk did.
What this source establishes
A British district manual, written with no interest in the parish, listing three convents in the whole Jesuit mission of Tinnevelly — and this is the only one away from the fishery coast. Stuart says so himself: he splits the mission into the Palamcottah district (which contains Vadakankulam) and the fishery coast (which contains the other two). Sisters were living here while the great church was still being built, and no parish record dates a convent here so early.