"Let us try her with the spy glass," said Robert, and drawing it out to its proper length, he gazed steadily at her for a minute. "That is a schooner, or rather an hemaphrodite brig. I can see her sails and masts. She is rigged like a revenue cutter, and seems also to have the rake of one. She is coming this way, and if she is a cutter, she is almost certainly bound for Tampa, and can take us home again."
How rapidly characters appear to shift with shifting circumstances! Mary and Frank, who but a minute before were the only ones calm and disposed to speak in tones of energy and hope, now began to weep and lose all self-control; while Robert and Harold, shaking off their despondency, sprang to their feet, and with bright eyes and ready limbs, prepared once more for effort. Harold seized the glass, and looked long and steadily. "She is coming to us, or we are going to her very fast," said he. "Perhaps both; and now what shall we do?"
"Rig up a signal, and load the guns," replied Robert. "Let us attract their attention as soon as possible. Quick, sister, get me a sheet!"
In the course of fifteen minutes they had the sheet rigged and floating; and by the time the guns were loaded, they could clearly discern not only the hull, but the port holes of the vessel, and her long raking masts. There was no further doubt that she was a revenue cutter bound for the bay. Still it became every moment more certain that without some change in the course of one or the other, they must pass at a considerable distance. Now what should they do? The sky, which had been gradually clouding over since they saw the vessel, began to be rapidly and heavily overcast as they approached. Fearful that rain might fall, and utterly obscure their signal before it was seen, the boys resolved to fire their guns, ere there was any reasonable hope that they could be heard. At the first discharge the fish, which had probably been frightened in the morning by the cannon at the fort, jerked so terribly as almost to unseat them. At the discharge of the remaining guns it seemed less and less alarmed, until finally it ceased darting altogether; its strength was failing. Soon afterwards they saw the smoke of two cannon from the vessel, and then a flag run up the mast. "They see us! They see us!" cried Robert and Mary.
"But can they help us?" asked Harold. "Here we are running between them and shore, faster than any vessel can sail except in a storm, and there is scarcely wind enough to fill their sails, and what there is is against their coming to our aid. Robert, we must break that chain, or yet all is lost."
There was apparently some bustle on board the cutter. Many persons could be distinguished by the glass looking at them and at the clouds. They were preparing to lower a boat, yet with manifest hesitation. This was immediately explained by the singular appearance of the cloud between the boat and the vessel. It had become exceedingly dark and angry. A portion in the middle assumed the shape of a trumpet, and descended with the sharp point toward the water; while a broad column ascended from the sea to meet it; and then sea and sky roared and tossed in terrible unison.
"It is a water-spout!" said Robert, "if it strikes the vessel she is gone. Look there, Harold, look!"
The cutter began to give sensible evidence of the whirling eddy. Her sails flapped and her masts reeled. Soon they heard boom! boom! the roar of two more cannon. They were for the purpose of breaking the threatening column. They saw the descending pillar gradually ascend, and spread itself into a dark mass of cloud, which poured out such a shower of rain as entirely to hide the vessel from sight. Afterwards they heard another cannon. "That is for us," Robert said; "let us answer it as well as we can."
They fired gun after gun, and heard cannon after cannon in reply, but each fainter than before. Their last hope of being saved by the vessel was gone. She was far away, and hidden by the rain which enveloped her. There had been no rain upon themselves, but it was very dark overhead, and threatened both rain and wind. They were far enough from home--how far they could not conceive, and far too from the barely visible shore, upon the broad wild sea. The boys were relapsing rapidly into that moody despair which is so natural after strong yet fruitless exertion, when a sharp flash of lightning struck in the water about one hundred yards before them. So near was it, and so severe, that they were almost blinded by the blaze, and stunned by the report. Their boat instantly relaxed its speed, and was soon motionless upon the water. The boys rushed to the bow. Their cable hung perpendicularly down, and the fish was nowhere to be seen. It had darted back from the lightning flash, and the cable had slipped quietly from its grasp.
"Thank God we are loose!" burst triumphantly from Robert. Harold looked on with strong emotion. Once more tears gathered in his eyes. "Robert," said he, "I never did make pretension to being a Christian, or a praying person, but if we do not thank God all of us for this when we get ashore, we do not deserve to live."