I have started estimating the probability I've found the right census record, using the following scale:
- confirmed
- either the record refers to the soldier's service in the 91st, or it is so tightly tied to a record that mentions his service that no reasonable doubt exists that this is the correct person
- see e.g. the 1880 census for James Aarons (confirmed by a link to a house special report about his pension)
- probable
- the man's name and age match the regimental records, and at least two other pieces of evidence (explicitly listed) connect the record to the soldier who served in the 91st
- likely
- the man's name and age match the regimental records, and at least one other piece of evidence (or two pieces of lower-quality evidence) (explicitly listed) connects the record to the soldier who served in the 91st
- uncertain
- the man's name and age match the regimental records, and no other plausible candidates exist
- speculative
- the evidence is plausible, but some problem exists (or the argument for the identification is complicated enough that I don't trust it!)