We had arrived at only a partial solution of the mystery, though we had done enough to relieve Captain Blastblow from any evil intentions in the premises. What Cornwood's connection with the affair was did not yet appear. He could not have known that Nick Boomsby was on board of the Islander, for he had gone to St. Augustine, where we had put in on account of stress of weather. He could not have known that we intended to put into St. Augustine, for we had no intention to do so when we left Jacksonville. Possibly Cornwood had put one thing and another together until he believed Nick had taken the four thousand dollars, and had made his escape in the Islander. It looked as though Cornwood had some connection with the robbery, for the Islander had hurried on her way to New Orleans, if she was bound there, as soon as the Sylvania came in sight. If he had delivered the letter to Captain Blastblow, the latter would have remained in Key West until the arrival of her owner, as instructed by the written message. "Cornwood and Nick did a good deal of talking, it appears, while the Islander was here," said Washburn, "though we don't know what it was all about." "I have no doubt Cornwood took the management of the case at this point," I replied. "Nick must have forged one letter to induce Captain Blastblow to start the Islander without her owner and his family; and I have no doubt Cornwood forged another to make him continue the voyage." "I hope we shall know all about the matter in a few hours more," said Washburn. "You understand the entire situation now, Captain Cayo, and see why we want to overhaul the Islander," I continued. "I see the whole of it, and I will do the best I can to outsail the other steamer; but that depends more on your vessel than on me," replied the pilot. "Will you let your men heave the log?" We had been driving the Sylvania to her utmost, and Ben Bowman reported that we were making eleven and a half knots, which was doing exceedingly well in the teeth of a fresh north-west wind. Captain Cayo went to the westward of the bar-buoy, while the Islander had gone to the eastward of it more than a mile. I saw that we had gained a mile by this course, and the Islander was not more than four miles ahead of us. I gave the pilot my views of the relative speed of the two vessels, though I told him that Captain Blastblow might get a higher rate of speed out of her than any one had done before. "We shall soon see which sails fastest," said Captain Cayo. "The Islander has laid her course for the South-west Pass of the Mississippi. All you have to do is to follow her. There is our pilot-boat; and this is as far as we usually take vessels." "But I don't care to have you leave us here, Captain Cayo," I replied. "It is clear enough that the Islander intends to keep out of our way. She may run in among the Dry Tortugas, and having a pilot on board, she could easily elude us."