James had completed the observation of Venus so he opened the letter that he was only supposed to after the transit of Venus.
The letter told him to search for the rich southern continent Terra Australis .
At 39 James was promoted to commander of the expedition. They headed westward across the Pacific Ocean where they arrived at Tahiti.
Cook continued sailing until he reached the coast of New Zealand where he mapped the entire coastline. Cook kept sailing westward until he found the West coast of Australia.
Captain James Cook sailed for the army.