This looks like the correct Martin and Mary Pearson.
https://www.familysearch.org/ark:/61903/1:1:M41T-BNM
I can PROVE nothing YET..... it's in progress as we speak. I believe there were TWO WATSON PEARSON's... SENIOR (1786-1870) and JUNIOR (1829->1900) Watson JR is on the 1900 Census....I really believe "transcribers" confused Watson/Watson and Martin/Martin, they are in BOTH generations. The WALTER listed on the 1850 Census of Martin I think is really WATSON! As I said-- I'm working on it right NOW, and I'm just a few steps from thinking I need to take up knitting!
brenda gemmell, this family appears to use the same names repeatedly. Not an unusual thing, but it does add to the difficulty factor.
Knitting is one of my other hobbies. I highly recommend it an additional hobby. ;)