HI
That's interesting. I have done a fair amount of research as I have struggled to get back before Edward Jackson. Unfortunately his birthplace is not given consistently on Censuses, he twice gave Manchester, once Macclesfield, and in 1841 not Cheshire. Additionally his first name was different in 1851. I won't believe have found the right one until I find a baptism for his brother James who was born in Macclesfield.
I have tried tracing James's wife Ellen. She is clearly Ellen Oliver, but her birthplace is not consistent, and I wonder if he married one Ellen (Lomas), who died between 1841-1851 and another Ellen, Ellen Oliver also between these two Censuses. Needless to say I have looked at Jacksons in this part of Macclesfield at an earlier date . There are Jacksons who are earlier grocers, though I never found a connection. Bob