"... in certain kinds of treason the testimony of one witness is insufficient - almost the sole recognition by English law of the general principle, familiar in legal history, that two witnesses are necessary for proof."
"Minutes were kept of each meeting, which if not verbatim are, according to Mr Tailford and Mr Brooks, [those were the employer's witnesses] a generally accurate recollection of what happened. They may have been prepared from notes taken after the event, but we have no reason to doubt the respondent's view that they are generally true."