Could this be John?
1861 ref: RG9/2529 Folio 37
James Sadler Head 40 b Catholen, Derbyshire engine feller colliery
Anne Sadler Wife 33 b Manchester, Lancashire
John R Sadler Son 11 b Lincolnshire
William Sadler Son 10 b Manchester
Charles Sadler Son 4 b Gidebridge, Lancashire
Barbara Sadler Dau 1 b Manchester
Newbold Rd, Chesterfield, Derbyshire
Sue