Annie,
I'm not quite sure what you mean here, have you seen the 1841 census with John on it ? or was it someone else who saw it ? My information was found on a web site not a CD
Could John have been Jonathon Field?
Info from familysearch.org
birth: 1815
death: 03 Oct 1882 — Baptist, Queensbury, Near Bradford, Yorkshire,
parents: Jeremiah Field, Hannah Field
name: Johnathon Field
death date: 03 Oct 1882
death place: Baptist, Queensbury, Near Bradford, Yorkshire, England
age: 67
birth date: 1815
father's name: Jeremiah Field
mother's name: Hannah Field
indexing project (batch) number: I05228-1
system origin: England-EASy
source film number: 990052
Dave