Couple of corrections - should be film 0106738 & Margaret Cain should be Margaret Crain
I did find a John Shimmin living in this 1841 census
Class: HO107; Piece 532; Book: 5; Civil Parish: Ashton Under Lyne; County: Lancashire; Enumeration District: 6; Folio: 19; Page: 33; Line: 8; GSU roll: 306917.
1841 Ashton under Lyne
Philip Caine age 40 born in other County
Elizabeth Caine age 30 wife born in County
Jane Caine age 1 daughter born in County
James Marsland age 65 born in other county - independent
John Shimmin age 45 born in other county - farmer
Also found a death for John Shimmin Jun 1841
District Ashton under Lynne
Cheshire, Lancashire
Tim