Complex sentence: When, in 1768, a northern Indian (some say it was Matonabbee) brought lumps of copper to Churchill, the governor, Moses Norton, decided to send Hearne in search of a possible copper mine.
Split into simpler sentences: When, in 1768, a northern Indian (some say it was Matonabbee) brought lumps of copper to Churchill. The governor, Moses Norton, decided to send Hearne in search of a possible copper mine.