Hello again,
I wondered the same too re Hamer/Mill Bank but can't find evidence. I went through the district covering Hamer Hall in 1851 but couldn't see anything re Mill Bank nor Hamer Cottage where Frederick Law was living. Lots of Hamer... houses for workers though on census.
Browsing 'Hamer Cottage' on internet reveals rehabilitation care home - in the right area but I assume rebuilt now.
There is this on Old Maps
http://www.old-maps.co.uk/IndexMapPage2.aspx -you can see Hamer Hall/Mill/New Mill etc.
Re births:
1841 has Edward Ainsworth and family in next entry to Frederick Law and Sarah.
Of those children -see earlier posts:
1851- Eliza Ainsworth 19 yrs niece - born Manchester living at Pit Bank
1851 HO107; Piece: 2175; Folio: 208; Page: 56
(Lodgers in Birkenhead)
Ellen Ainsworth 23 yrs b Rochdale
Ann F -do- 22 yrs b Manchester
(with Jesse and Hannah Ainsworth)
the birthplaces of Ann and Eliza (the two youngest) indicate that the family may be in the Manchester area by 1830 ish although the baptisms are at Ogden still.
However Frederick and Sarah both seem to be in Rochdale area in 1838 - He in Hamer and her Butterworth. Now I think from reading that Butterworth/ Weurdle and Wardle abut each other in areas - intriguing

Who were the witnesses at Frederick and Sarah's marriage? Do they offer any clues? I was thinking that if she was staying with someone other than her parents, she may have them as a witness
