Copy of the specification of a patent, granted to Benjamin Thompson, of Ayton Cottage, in the county of Durham, gentleman : for his invention of "a method of facilitating the conveyance of carriages along iron and wood railways, tram-ways, and other roads," dated the 24th day of October, 1821, specification enrolled the 14th day of December : with remarks thereon by the patentee, and the result of a trial of the invention, &c. &c.