Clif had elected to imperil his own existence rather than allow one of the enemy's boats to pass that blockade without warning to the American ships. But he had no intention of lying idly by in the path of the hostile craft. He waited but a moment after the glare of the last rocket had died out in the air, and then bent to the oars, and urged the boat toward the open sea beyond. And then he had every confidence that he had little to fear from the enemy's boat. "They'll have all they can do to look out for their own safety now," he thought, "without paying any attention to me. The New York has seen the signal, and will not be slow in making out the cause. Then look out, Mr. Spaniard." But there was more taking place upon those waters than Clif was cognizant of, and peril came from an unlooked-for source. His decision to send up the warning signal had been quickly formed after his first discovery of the strange vessel. He had seen at a glance that it was not a warship, but a merchant steamer. It was moving slowly, and apparently seeking, as much as possible, the concealment afforded by the shadow of the coast. Every feature about it showed that it was trying to quietly steal out past the blockading vessels. Clif had not delayed, but on the impulse of the moment had sent up the signal rockets while he was yet between the ship and the shore. But a few steady strokes would carry him beyond the enemy and toward the flagship, he thought. But to his surprise he noticed, on glancing over his shoulder as he drew nearer the vessel, that the latter was moving slower than before and in fact had just stopped. This was puzzling to him, for now, if at any time, the boat should be showing its utmost speed. Those on board must surely know from the signals that they had been discovered and that pursuit would instantly follow. A few words will explain the situation to the reader. The vessel was, as Clif suspected, endeavoring to steal out past the American ships, which were known to be in the vicinity. But a short time before Clif had left the shore for the second time, the blockade runner had slowed down, and a boat, manned by half a dozen sailors, had been sent ashore. An officer in the Spanish army, with important dispatches, was to be taken aboard at a point not far from where Clif had landed. The work of the Spanish boat's crew had been expeditiously performed, and when Clif sent up his signal, they were returning to the ship. Unnoticed by Clif in his excitement at the time, they were close to one side of his boat at that fateful moment. A pistol shot suddenly ringing out in the air and a bullet flying not far from his head apprised the cadet of danger from that quarter. The Spaniards, as was natural for them to be, were aroused to a high pitch of excitement against the youth whose vigilance promised to set all their plans at naught.