the crater, or, vulcan’s peak ebook

Two surviving American sailors, Mark and Bob, found themselves on a bare volcanic rock in the middle of the ocean. Gradually, they manage to form a soil layer using silt, guano and algae. As a result of a storm, Bob is carried away on a boat to the ocean, but he manages to get to America, from where, after stories about adventures, a party of their 9 relatives and friends of sailors arrives.