Leslie Stephen,
Dictionary of National Biography…
(1898)
“ Teach seems to have been fierce, reckless, and brutal, without even the virtue of honesty to his fellows. In all the official papers, naval or colonial, respecting this pirate, he is called Thatch or Thach ; the name Teach which has been commonly adopted, on the authority of Johnson, has no official sanction. It is quite impossible to say that either Thatch or Teach was his proper name. ”
