In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Passage: The second of James Cook's historic voyages, 17721775, was primarily a search for the elusive Terra Australis Incognita that was still believed to lie somewhere in the unexplored latitudes below 40S. Cook left England in September 1772 with two ships, HMS Resolution and HMS Adventure. After pausing at Cape Town, on 22 November the two ships sailed due south, but were driven to the east by heavy gales. They managed to edge further south, encountering their first pack ice on 10 December. This soon became a solid barrier, which tested Cook's seamanship as he manoeuvered for a passage through. Eventually, he found open water, and was able to continue south; on 17 January 1773, the expedition reached the Antarctic Circle at 6620'S, the first ships to do so. Further progress was barred by ice, and the ships turned north-eastwards and headed for New Zealand, which they reached on 26 March.During the ensuing months, the expedition explored the southern Pacific Ocean before Cook took Resolution south againAdventure had retired back to South Africa after a fracas with the New Zealand native population. This time Cook was able to penetrate deep beyond the Antarctic Circle, and on 30 January 1774 reached 7110'S, his Farthest South, but the state of the ice made further southward travel impossible. This southern record would hold for 49 years.In the course of his voyages in Antarctic waters, Cook had encircled the world at latitudes generally above 60S, and saw nothing but bleak inhospitable islands, without a hint of the fertile continent which some still hoped lay in the south. Cook wrote that if any such continent existed it would be "a country doomed by nature", and that "no man will venture further than I have done, and the land to the South will never be explored". He concluded: "Should the impossible be achieved and the land attained, it would be wholly useless and of no benefit to the discoverer or his nation".
What was Cook looking for when he left England in September 1772 with two ships?