Help please with finding the death of a Mary Jackson 80 years who appears in the 1841 Census residing in Thurgarton, Southwell Division. She does not appear in the 1851 Census and on checking the free BDM I have found lots of people of the same name who died in Southwell over that 10 year period. Her son was John Jackson who she was living with in 41. Can anyone assist with this or do I have to visit the records office. Thanks in anticipation. Paul Jackson