Holding on his course westwards, the admiral found the depth of the water gradually to lessen, till passing through five and four fathoms, they at length had only two and a half at the ebb. The tide differed considerably in this place from what it had been found at Trinidada; for whereas there it ebbed and flowed three fathoms, here, at forty-five leagues to the westward it only rose and fell one fathom. At Trinidada both during ebb and flow, the current always ran west, whereas here the flood made to the west, and the ebb returned to the east. At Trinidada the sea water was brackish, while here it was sweet, almost like river water. Perceiving this difference, and how little water they had, the admiral durst not proceed any farther with his own ship, which being of 100 tons burthen, required three fathoms water; he therefore came to anchor on the coast in a very safe port, land-locked on all sides and shaped like a horse shoe. From this place he sent on the little caravel called _El Borreo_, or the Post, to discover if there were any passage westwards among these supposed islands. She returned next day, the 11th of August, having gone but a short distance, and reported, that at the western point of that sea there was a mouth or opening two leagues over from north to south, and within it a round bay, having four little bays, one towards each quarter of the Heavens, into each of which a river flowed, which occasioned the water of that sea to be so sweet, which was yet much sweeter farther in; and they added, that all this land which they had considered as separate islands was one and the same continent. They had everywhere in that interior bay four or five fathoms water, which so abounded in those weeds they had seen on the ocean as even to hinder their passage.