Hmm. There are no other Dickinson baptisms in Carleton in that period, and when Maria married in Gargrave in 1788 she was OTP.
I can't find a baptism in Gargrave either; there is one in Skipton in 1768, but the parents' names (Richard and Janet) don't match any of Maria's children's names.
So I'll definitely bear the Carleton one in mind, but I think it's unlikely at the moment.
Thanks anyway