E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Greaves (Sir Launcelot).
A sort of Don Quixote, who, in the reign of George II., wandered over England to redress wrongs, discourage moral evils not recognisable by law, degrade immodesty, punish ingratitude, and reform society. His Sancho Panza was an old sea captain. (Smollett: Adventures of Sir Launcelot Greaves.)