Drake was being pursued by the Spanish Navy. When he entered the mouth of San Francisco Bay, he was looking for a safe place to make repairs to the Golden Hinde before the long voyage across the Pacific Ocean. Captains of sailing vessels knew the perils of running aground in uncharted waters. Doing so could result in the loss of their ship and perhaps the lives of their crew.
Drake spotted a secluded cove ten miles north of the mouth of the Bay along the San Quentin Peninsula.
"The Cove" was not visible from the mouth of the Bay, and he knew that the Spanish were unlikely to continue their pursuit beyond the mouth of the Bay due to the potential consequences.
After maneuvering slowly northward with all four ships, he arrived at his destination. There, they offloaded the cargo and set up camp. He had the Miwok build the breakwater in the cove to help conceal his ship.
Several Inca artifacts were discovered at The Cove and are shown immediately below. These included a jade carving, an Ica stone, and a conglomerate Stone tool bearing the image of the Inca with an elongated head. Elongation of the skull was a practice reserved for Inca royalty.