Accordingly, they took to their heels, and ran down the road. Then they turned into another, and were hurrying along it, when they heard a whistle behind them. It was shrill and piercing, and was at once taken up and repeated on either side of them and in front. Then, to their astonishment and dismay, a bright spot suddenly rose up and flashed from the edge of the harbor, and a broad electric beam swept rapidly and silently on its way towards them.

"The searchlight!" exclaimed Hal. "Down into the shade at once, or we shall be discovered. These fellows are proving far more wide awake than I had imagined them to be. I should say that they have telephones from all the outlying stations and barricades, which enable them to communicate with the people in charge of the light."

And, indeed, this was the case. Balked in his endeavor to trace the two suspicious characters who had disappeared into the house after violently assaulting him, the Spanish officer had at once rushed to the barricade, and had sent messages along the wires to other parts. Then, too, the outlying pickets had been warned by the blowing of whistles, which was evidently a previously arranged signal in case of trouble occurring. Before even the searchlight had burst into the night or commenced to revolve, Hal and Gerald were entirely surrounded by a cordon of vigilant men, few of whom knew exactly what was happening, though all could guess that someone was near at hand whom it was desirable to capture. And the electric light would help them. Meanwhile, they would stay in some dark spot, and follow the rays, hoping to catch sight of the fugitives as they darted from side to side in the endeavor to escape them. A dark figure crouching beneath a tree or hedge would satisfy them, and on the instant, up would fly the rifle to the shoulder, there would be just a second's pause to correct the aim, and then—bang!—the hapless fellow would spring into the air with hands outstretched, to fall next second doubled into an inert heap. Oh, yes! it was simple, and an extremely diverting sport to those who had themselves no danger to fear.

As for Hal and Gerald, their desperate position filled them with consternation, for as they ran hither and thither in the vain endeavor to fly from the sweeping beams, the snap of twigs and the rustle of leaves brushed on one side were followed by the sharp crack of rifles fired at random in that direction. Perhaps there was no great danger to them in that; but still, the bullets flew unpleasantly near, and sent them running again, hunting them like hares from point to point. Suddenly, as they crossed an open space, the searchlight fell full upon them, and instantly the surrounding darkness was lit up by the flash of many rifles. Ping! ping! ping! The shots rang out with startling loudness, and the bullets hummed and pelted through the air overhead.

"Halt there, and surrender!" a voice cried from the trees. "If you move a step farther away I will shoot you."

"We are caught, and must make the best of it," said Hal to Gerald, with a groan. "Tell them that we give in, old fellow."

Holding his hands above his head, Gerald did as he was asked. Then they stood still in a patch of brilliant light, which was made all the more glaring by the contrast of thick darkness all around. A few minutes later some Spanish soldiers advanced towards them, rifle in hand, and, forming a ring round the lads, marched them away, their path lit up all the while by the electric light which followed every movement. Passing down the street, they at length came to a large building, into which the prisoners were at once taken.

"Sit down there, and do not stir a finger, or you will be shot," said the sergeant who was in charge of the party, indicating a rough bench with a curt nod of his head. "I will go inside and ask his excellency the colonel to interview you. By the time he is ready, those who warned us from the barricade will have arrived to give their evidence; and then, my friends, it will be a case of a rope, a friendly branch, and plenty of air to dance on."

He glanced at his captives, favoring them with a malicious grin as he outlined their probable end. Then he went to a door close at hand, and, having knocked upon it, entered, and closed it behind him.

"I suppose he has gone to explain matters," said Hal coolly. "Keep up your pecker, Gerald. The case looks precious bad, but we'll pull through, depend upon it."