Shaun, I see you found the Coleridge book - I thought you had found my tree at Ancestry.

Your observations are correct about the appropriate age to become a nun; however, the average age of students coming into the convent
school was 10. It seems a bit odd that the family would send three girls of marriagable age to the school with children so much younger, though I will admit that there are rare instances of girls as young as 3 or as old as 20 in attendance. These were highly unusual; the 20 yr olds, for example, came escape the French Revolution, while the 3 yr old came with older sisters after their mother died.
That being said, I did find a second marriage date of 1798 for Page and Ann, which alters birthdates for their children - Page Jr, for example, is listed on KK with a 1791 birthdate, while the census records lists him as 1803. I'm looking into this some more to see what develops. I wish there was a "Louisa" listed on the KK tree; I'd be more convinced. . .
Kathy