COLUMBUS SAILS WESTWARD.
At last a favourable breeze sprang up, enabling the admiral to take a westerly course, the one he most desired, as he had before noticed in his voyages to the Indies that about a hundred miles west of the Azores there was always a sudden change of temperature.[15]
[Footnote 15: I suppose he came into or out of one of those warm ocean rivers which have so great an effect in modifying the temperature of the earth—perhaps into the one which comes from the south of Africa through the Gulf of Mexico, to our own shores, and on which we so much depend.]