Conversation so far:
Did James Cook find newfoundland?
James Cook sailed thousands of miles across largely uncharted areas of the globe.
what was the newfoundland?
Newfoundland is the world's 16th-largest island, Canada's fourth-largest island, and the largest Canadian island outside the North.
could you tell me more about what is in the James Cook article please besides that James Cook sailed thousands of miles across largely uncharted areas of the globe?
Throughout his service James Cook demonstrated a talent for surveying and cartography and was responsible for mapping much of the entrance to the Saint Lawrence River
When did James Cook start the mapping?
James Cook joined the British merchant navy in 1755. He saw action in the Seven Years' War and subsequently surveyed and mapped much of the Saint Lawrence River entrance

Question: how did the mapping of Saint Lawrence river help?
Self-contained rewrite: how did the mapping of Saint Lawrence river help James Cook?