The 1861 link posted by PaulineJ is not the right one.
Daughter Ann Maria aged 2 in 1851 is a servant as plain Ann in Marwood 1861 (12). as is son Walter (as Mires) also in Marwood.
Cannot see any obvious death for Charles Mars (variants) at all, nor any further trace of son John after 1851.
Mary Balmont (as written) bp.7/9/1823 Marwood, Devon dau. of George and Mary.
Annette