One other expedition to Canada deserves brief mention before we come to Cartier's crowning discovery of the St Lawrence river. This is the voyage of Stephen Gomez, who was sent out in the year 1524. by Charles V, the rival of Francis I. He spent about ten months on the voyage, following much the same course as Verrazano, but examining with far greater care the coast of Nova Scotia and the territory about the opening of the Gulf of St Lawrence. His course can be traced from the Penobscot river in Maine to the island of Cape Breton. He entered the Bay of Fundy, and probably went far enough to realize from its tides, rising sometimes to a height of sixty or seventy feet, that its farther end could not be free, and that it could not furnish an open passage to the Western Sea. Running north-east along the shore of Nova Scotia, Gomez sailed through the Gut of Canso, thus learning that Cape Breton was an island. He named it the Island of St John-or, rather, he transferred to it this name, which the map-makers had already used. Hence it came about that the 'Island of St John' occasions great confusion in the early geography of Canada. The first map-makers who used it secured their information indirectly, we may suppose, from the Cabot voyages and the fishermen who frequented the coast. They marked it as an island lying in the 'Bay of the Bretons,' which had come to be the name for the open mouth of the Gulf of St Lawrence. Gomez, however, used the name for Cape Breton island. Later on, the name was applied to what is now Prince Edward Island. All this is only typical of the difficulties in understanding the accounts of the early voyages to America. Gomez duly returned to the port of Corunna in June 1525.