There were two men in St. Blazey parish named Thomas Robins who both had daughters named Jane within a few months of each other. One was at Biscovey and the other at Parr.
The Biscovey Thomas appears to be the older of the two, since he had an earlier son Henry. He married Mary Ann Martin 12 Apr 1823 at St. Blazey. Their son Henry was baptized at St. Blazey 25 Dec 1823. And their daughter Jane was baptized at St. Blazey 6 Mar 1825.
The Parr Thomas apparently married in a different parish and moved to St. Blazey. His wife was Matilda. Their first child to be baptized at St. Blazey was Jane on 7 Nov 1824 -- just 4 months before the other Thomas' Jane.