Thank you both. I've been able to cull a bit of information from familysearch and will head over to the library to check out ancestry when the weather clears a bit.
Frian, do you have a date of death for Ann? I've found 2 possiblilities, 1844 and 1851. I'm leaning toward the 1844 as she is living with her son Jacob and is 80. The database that I can access for UK census records also has an Ann Cornthwaite, 93, in Westmorland in 1851. I was trying to check her out in 1841, but they have messed up the index/image and the Ann Cornthwaite living with Jacob is on both images.
Thanks again to you both for both your interest and information provided.