Sidney Lee, Dictionary of National Biography… (1889)
“ In the folio edition of Shakespeare's works Fastolf's name is spelt Falstaff when introduced into the ‘First Part of Henry VI.’ This may seem to give additional weight to the theory that the Sir John Falstaff of Shakespeare's ‘Henry IV’ and ‘Merry Wives of Windsor’ is a satiric portrait of Sir John Fastolf. Shakespeare represents Falstaff to have been brought up in the household of the Duke of Norfolk, as Fastolf is reported to have been. Fastolf had a house in Southwark, and his servant, Henry Windsor, wrote to John Paston, 27 Aug. ”
