A letter from Mr. Dawes to John Horne Tooke, Esq. : occasioned by a part of his speech to the Middlesex freeholders, assembled by public advertisement of the sheriff of that County, at Hackney, on Wednesday, the 29th of May, 1782 : in which an apparent error, on a fundamental principle of government and legislation, supported by Mr. Horne's credit and eloquence, is refuted and exploded