Yes, I'm 99% sure that 'my' Francis is the one who married Caroline Cassaday, and they seem to have had 6 children. After Caroline's death I believe that Francis went to Balbriggan (because of the renowned hosiery factories there) with most of his children and his 2 widowed brothers (Arthur b1832 and William b1835). Several of these (including Francis jun b1846 - to add to confusion!) married local people, then stayed in Balbriggan, emigrated to the US or moved back to Notts.
I have learnt quite a lot about these people, but Mary continues to elude me. A Sutton burial in 1899 of Mary Spencer, age 61, looked promising, but this Mary appears to be the one married to Charles.