chunk: Years later, Crusoe joins an expedition to bring slaves from Africa, but he is shipwrecked in a storm about forty miles out to sea on an island (which he calls the Island of Despair) near the mouth of the Orinoco river on 30 September 1659. The details of Crusoe's island were probably based on the Caribbean island of Tobago, since that island lies a short distance north of the Venezuelan coast near the mouth of the Orinoco river, in sight of Trinidad. He observes the latitude as 9 degrees and 22 minutes north. He sees penguins and seals on his island. (However, seals and penguins live together in the Northern Hemisphere only around the Galápagos Islands.) As for his arrival there, only he and three animals, the captain's dog and two cats, survive the shipwreck. Overcoming his despair, he fetches arms, tools and other supplies from the ship before it breaks apart and sinks. He builds a fenced-in habitat near a cave which he excavates. By making marks in a wooden cross, he creates a