We all have gaps in our knowledge of genealogical records. Those gaps are exposed when the records we typically use to “answer our questions” either are not available or don’t provide enough information upon which to make a reasonable conclusion.
The United States Revolutionary War Pension Payment Ledgers, 1818-1872 (available on FamilySearch and on microfilm from the US National Archives) were one set of records that I initially did not use when researching individuals who received these pensions. That was a mistake. The ledger can provide additional details on the pensioner that may not be available elsewhere–particularly their date of death.
What sources are out there that you might not have used? When was the last time you asked this yourself this question and really tried to find the answer?