The second northern cruise of 1848, which lasted nine months, had for its object the completion of the survey of the Inner Passage as far as New Guinea and the adjoining archipelago. The third cruise in 1849-50 again lasted nine months, and continued the survey in Torres Straits, the Louisiade archipelago, and the south-eastern part of New Guinea. After this the original plan was to make a fourth cruise, filling up the charts of the Inner Passage on the east coast, and surveying the straits of Alass between Lombok and Sumbawa in the Malay Archipelago; then, instead of returning to Sydney, to proceed to Singapore and so home by the Cape. But these plans were altered by the untimely death of Captain Stanley on March 13, and the "Rattlesnake" sailed for England direct in May 1850. There was a great monotony about these cruises, particularly to those who were not constantly engaged in the active work of surveying. The ship sailed slowly from place to place, hunting out reefs and islets; a stay of a few days would be made at some lonely island, while charting expeditions went out in the boats or supplies of water and fresh fruits were laid in. On the second expedition there were two cases of scurvy on board by the time the mail from Sydney reached the ship at Cape York with letters and lime-juice, the first reminder of civilisation for four months and a half. On this cruise there was an unusual piece of interest in Kennedy's ill-fated expedition, which the "Rattlesnake" landed in Rockingham Bay, and trusted to meet again at Cape York. Happy it was for Huxley that his duties forbade him to accept Kennedy's proposal to join the expedition. After months of weary struggles in the dense scrub, Kennedy himself, who had pushed on for help with his faithful black man Jacky, was speared by the natives when almost in sight of Cape York; Jack barely managed to make his way there through his enemies, and guided a party to the rescue of the two starved and exhausted survivors of the disease-stricken camp by the Sugarloaf Hill. It was barely time. Another hour, and they too would have been killed by the crowd of blackfellows who hovered about in hopes of booty, and were only dispersed for a moment by the rescue party.