 Cook's maps were used into the 20th century, with copies being referenced by those sailing Newfoundland's waters for 200 years.Following on from his exertions in Newfoundland, Cook wrote that he intended to go not only "farther than any man has been before me, but as far as I think it is possible for a man to go".On 25 May 1768, the Admiralty commissioned Cook to command a scientific voyage to the Pacific Ocean.