Gulliver's Travels Part 4 Chapter 3

In which the narrator, under the tutelage of a most patient Houyhnhnm, endeavours to acquire the curious language of these noble creatures, much to the astonishment of his equine instructors and their neighbours, whilst concealing the human artifice of his clothing to distinguish himself from the brutish Yahoos. With growing fluency and candour, he relates to his master the strange tale of his oceanic voyage and origin, which the wise horse receives with polite incredulity, for the notion of such crafts and foreign lands lies beyond their natural conceit.