Thanks for that David. I'm not doubting you for a moment, but can you explain why you are so certain that we're talking about one and the same Elizabeth Kirkham?
I actually suspect you're right as Isaac Parfitt's will has in a Lincolnshire connection that I've never been able to get to the bottom of. One of the beneficiaries is - Mrs Elizabeth Dunnington wife of Mr John Dunnington of Lincolnshire.
I'm wondering if you have this couple on your tree? I'm not entirely certain we've read their surname correctly and have no idea who they are in relation to Isaac Parfitt or his wife.
Do feel free to write to me directly if you'd like.