Entirely possible! I was worried about that.
As if we didn't have enough red herrings yet, I've just remembered the Mary Spense who is 2 doors down from the Gardener family in Coxwold in 1841:
http://search.ancestry.co.uk/iexec?h...=&pid=11773090
Lunch is being prepared for me and I have to go try to calm down sufficiently to eat it! Back shortly.
EDIT: Never mind! That Mary Spense doesn't look likely, and anyway I've just realized that George probably met Jane in York, not in Coxwold.