Bound with "The Flying Island, &c. Being a Key to Gulliver's Voyage to Laputa, Balnibarbi, Glubbdubdribb, Luggnagg, and Japan. In a Third Letter to Dean Swift" (ESTC T2484) and "The Kingdom of Horses. Being a Key to Gulliver's Voyage to the Houyhnhnms. In a Fourth Letter to Dean Swift" (ESTC T2485).
University of Michigan's MIRLYN catalogue suggests an additional titlepage (apparently in v. 1) reading "Lemuel Gulliver’s travels into several remote nations of the world : compendiously methodized, for publick benefit, with observations and explanatory notes throughout. London: printed in the year MDCCXXVI," suggesting, perhaps, ESTC T108502.
Identified by ESTC as an instance of ESTC T139450, but Parts III and IV have continuous pagination, suggesting perhaps T139452.