Thank you again very much Cas, mckha489 and Sue!!!
I've learned so much from you in the last 36 hours. One nice thing is that as difficult as life was in Rochdale in the 1840s, and although Edwin's parents settled there, they hail from lovely, ancient, much more peaceful towns just a little further east. Illingsworth on the northern outskirts of Halifax, Killinghall and Ripley with its lovely church, and idyllic Fewston, a few hours walk from Bolton priory to the west and even closer to Studley park and Fountains Abbey (the Unesco site) to the north. (I found only one Rothwell with 'Find a Grave' in all the cemeteries of greater Halifax, which indicates that Abraham Sr. might have roots elsewhere, although I know that most gravestones don't hold up well after 200 yr.s.)
I will sign up for that heritage site later this summer, as I had done years ago.
Thank you again! More soon.