Columbus again set sail, and discovered a new island which he called Gracia; but what he imagined to be an island, was, in reality, a portion of the American coast, and that part of the shore of Venezuela, which, being intersected by the numerous branches of the Orinoco, forms the Delta of that river. On this day the Continent of America, although unknown to him, was really discovered by Christopher Columbus, in that part of Venezuela which goes by the name of the Province of Cumana. Between this coast and the Island of Trinidad there is a dangerous gulf, the Gulf of Paria, in which a ship can with difficulty resist the currents which flow towards the west with great rapidity. The admiral, who believed himself to be in the open sea, was exposed to great peril in this gulf, where the rivers, falling into the sea from the continent, and being swollen at that time by an accidental flood, poured great masses of water upon the ships. Columbus, in writing to the king and queen, describes this incident in the following terms:-- "Being up on deck, at an advanced hour of the night, I heard a kind of terrible roaring; I tried to see through the darkness, and all at once I beheld a sea like a hill, as high as the ship, advancing slowly from the south towards my vessels. Opposing this great wave was a current, which met it with a frightful noise. I had no doubt then that we should be engulfed, and even now the remembrance causes me a feeling of horror. By good fortune, however, the current and the wave passed us, going towards the mouth of the canal, where, after long strife, they gradually sank to rest." [Illustration: GULF OF MEXICO AND THE ANTILLES. After the Map of Theodore de Bry.]