I looked in the direction indicated, and could just make out a sail. I examined it through the glass, and was satisfied it was the Islander. I had calculated that we ought to be up with her by noon; but it was evident to me that her captain had been hurrying her, as I did not anticipate he would do. I soon assured myself that she was not on the same course as the Sylvania. She was headed at least a point more to the westward. We had on all the sail it was prudent to carry, and Ben Bowman declared the engine was doing its best. "We have been gaining on her every hour," I said to the mate. "If we keep on we shall overtake her in a few hours, though she is making her best speed." "But she is going more to the westward than we are," added Washburn, looking at the chase through the glass. "I think she is making a mistake, for I should not care to be mixed up among those shoals if it comes on bad weather; and it looks like it now." "The wind is hauling more to the southward, and I shall look for a fog before night." We kept on our course as laid down in the Coast-pilot, without regard to the Islander. I called the passengers at two in the afternoon, when we again changed our course to south, quarter west, to show them the Islander. She was still headed a point farther to the westward than we were. As our course from this point to Key West was on the circumference of a quarter-circle, I supposed Captain Blastblow only intended to take the shortest way by keeping inside of us, and I did not alter anything. But I was confident that he would have to run outside again in order to avoid the shoals of Virginia and Biscayne Keys. I had studied the chart carefully every day, and had found places where there was not more than four, or even more than two, feet of water at low tide, as it was at this time. At four o'clock the Islander was not more than a mile to the south of us, though she was two miles nearer shore than we were. We were abreast of the light-house at Cape Florida, and I expected to intercept the Islander when she came out from the dangerous shoals, rendered doubly dangerous by the threatening weather. But the other steamer gave no indications of changing her course, and I soon saw her close to the light-house. "She seems to be behaving very strangely, Captain Alick," said the mate, as we were watching her from the pilot-house. "It seems to me that she is losing time. There are shoals and rocks just to the southward of her," I replied. "There she goes about!" exclaimed Washburn, as she pointed her bow to the eastward. "I think we had better take in all the sail we carry, for we have only a mile of southing to make while the other steamer makes two miles of easting." All hands were called for this duty, for the wind was coming heavier and heavier every minute. The mate and the four men made quick work of it. The Islander carried no sail, though her people must have seen the Sylvania two hours before.