Hi Pete. No problems whatsoever "leaping into my thread", as that's the only way of finding things out, though unfortunately, it doesn't appear so this time.
Although Joseph and Mary Corfe are my direct ancestors, this is the only Corfe surname I've really followed. They came from Salisbury, Wiltshire, and had 3 sons and a daughter, I being descended from the daughter, therefore no more Corfe family surnames for me.
The four children were all born around 1760's/1770's in Salisbury. One son died unmarried in a naval shipwreck, one married to a Bella Graham and I know of no children. The 3rd son son married, and had some 10 children around the time of the birth of your ggg grandmother, but no Sarahs. And the daughter only had one child, my gg grandfather.
So can't help you with your Corfes, but good luck, and enjoy your "hunting".
Les