Known sourcecanonical
"Cæsar had his Brutus; Charles the First, his Cromwell; and George the Third ["Treason!" cried the Speaker]--may profit by their example. If this be treason, make the most of it."
Patrick Henry / Speech in the Virginia Convention, 1765.
Speech in the Virginia Convention, 1765.
Bartlett's Familiar Quotations, 9th ed. (Little, Brown, 1905), public domain