E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Summoned before the mayor of Halgaver. The mayor of Halgaver is an imaginary person, and the threat is given to those who have committed no offence against the laws, but are simply untidy and slovenly. Halgaver is a moor in Cornwall, near Bodmin, famous for an annual carnival held there in the middle of July. Charles II. was so pleased with the diversions when he passed through the place on his way to Scilly that he became a member of the self-constituted corporation. The mayor of Garratt (q.v.) is a similar magnate.