After gaining the Coast Miwok's trust, Drake journeyed to explore the inland area and visit their villages. Accompanied with crew members, Drake trekked on a Coast Miwok trail to traverse the Inverness Ridge and descend into what is now the Olema Valley. Francis Fletcher observed and wrote in detail regarding the wildlife, countryside and climate. He wrote in great detail on the Coast Miwoks themselves in day-to-day activities being the first person to make a written record of any of the 64 distinct language groups in prehistoric California.