I know this may seem plainly obvious but always check for spellings. I have found in various documents and census returns some name changes from Burrows to Borrows, Burrus Boroughs, Bourows, Borus, Barras, etc etc .Another example is a different branch of my family, the Maclaurins. One census gave them as Machmar and another as Melanson!!!Nothing like Maclaurin, daft 'a'peth!!!! keep checking and think of the daftest spelling you can come up with... who knows... you may hit on a mine of information.