squiz on Family Tree Circles

In am looking for info on WILLIAM SQUIRES and JANE KENNEDY. I have found them in the 1841 england census, they have 4 children, Joseph, Samuel, Ann and Maria.They lived in Mountsorrel Leicestershire. Birth dates would be around the 1800. In the 1851 sensus on Jane, Joseph, Samuel and Maria can be found, Ann died in 1846? I can not find any marriage details for William and Jane, or death info for william between the 2 census dates. I have details of the children from when they arrived in Australia in 1856. William would be my GGGgrandfather.

Looking for Birth Dates for William and Jane
Marriage Details for above
Death details for William