Frobisher waited until the sound of his visitor’s footsteps had died away along the corridor, and then, congratulating himself upon the fact that that worthy had left the light behind him, re-possessed himself of his piece of iron rod, and with the assistance of the lantern set to work upon the lock again, in the hope that he might be able to complete his skeleton key and let himself out before the Governor returned to carry out his threat. But this was a more difficult matter than he had anticipated; and after about two hours of ineffective tinkering he was compelled to acknowledge himself defeated.

With a bitter objurgation he flung the useless and twisted rod into a corner, and, not being able to find anything else that would serve his purpose, made up his mind that he would have to await developments, and rely upon his own strength of arm to get himself out whenever the Governor or somebody else should visit the cell. Meanwhile, if he were to be in good form for a possibly strenuous morrow, it was necessary that he should sleep, seeing that nobody had thought it worth while to provide him with any food; so, unsheathing the sword, with the help of which he proposed to effect his deliverance, he flung himself down at the far end of the chamber, laying the weapon beside him, and had scarcely touched the floor before he was fast asleep. He had been more worn out and weary than he had at all suspected.

It seemed as though he had just closed his eyes, when he was awakened by a thundering crash of sound, apparently close at hand. The chamber in which he was confined quivered perceptibly with the shock; while, right upon the heels of the concussion, came the noise of a distant explosion.

“A heavy gun, by Jingo!” ejaculated Frobisher, springing to his feet; “and whoever fired it is using this place as a target! That shot must have struck close outside here. What is in the wind now, I wonder? Anyway, if they are attacking this fort, they must, in a certain way, be friends of mine, for they are certainly the enemies of my enemies within the walls. Pound away, boys!” he exclaimed cheerfully, apostrophising the unseen gunners; “pound away! If you don’t kill me first, you may perhaps make an exit for me through that wall.”

At that moment he heard the sound of voices raised in alarm, the shouting of orders, and all the indications of a suddenly-awakened and thoroughly-alarmed garrison. Men were rushing about here and there, the rattle of arms sounded distantly through the iron-bound door; and presently, from the battlements, apparently directly over his head, there boomed forth the crash of the Korean garrison’s answering gun, followed almost immediately afterwards by still another tremendous shock, accompanied by the rumble and rattle of falling masonry as another shot from the attacking force struck full upon the fortress wall, this time seemingly just above him. The foemen gunners seemed to have waited for the flash of the gun on the battlements, and aimed for that, and they appeared to be making pretty good practice.

The young Englishman looked at his watch—which had somehow escaped the fingers of his captors, and which he had kept wound regularly—and found to his astonishment that it was close on half-past four o’clock in the morning, and that therefore daylight could not be very far distant. It would not be long before he could climb up to his perch at the window, and see who the attackers were. Meanwhile the explosions had increased from the exchange of single shots to a general cannonade on both sides; and now the very atmosphere was vibrating with the deafening concussions, as the guns on the battlements roared and the heavy conical shot from the attacking party plunged against the thick masonry of the walls, toppling down great masses of stone, mortar, and débris at every hit.

The gunners were evidently directing their fire mostly on that portion of the building wherein Frobisher was confined, and he told himself that it would require but little more of their attention before the walls became so shattered that the shot would come plunging right into the cell. He began to speculate on what would then happen first—whether he would be blown to pieces or smashed into shapelessness, or whether an opening would be made by which he might be enabled to escape. If only a shot would strike directly upon the iron bars of the window, perhaps it would enlarge the aperture sufficiently to allow him to crawl through.

Looking up at the window, as the idea entered his mind, he saw that the sky was already flushed pink, and knew that there would therefore be light enough outside to enable him to see what was going on; and he at once climbed up on the pile which he had collected, and, hauling himself up to the opening, looked out.

At the edge of the jungle he observed half a dozen big field-pieces drawn up in line, and he could see the gunners busily loading and reloading from the piles of ammunition placed beside each gun; while behind, on the slightly-rising ground, and partly concealed by the jungle, it was possible to make out a large body of riflemen who, now that the light was increasing, were preparing to take their part in the attack. There was no doubt as to the identity of the attackers, for Frobisher could now distinguish several flags similar to those flown on the boats of the rebel squadron a few days previously, during the fight on the river. That particular force had evidently been joined by another contingent, and the two combined had decided to make another attempt to recapture the all-important cargo which now reposed within the walls of the fortress of Asan.

But suddenly, as the interested Englishman watched, he heard a loud, shrieking, whirring sound, somewhat resembling the very rapid exhaust from a locomotive, and a flash of flame leaped out close alongside one of the guns, followed by a loud explosion and a great cloud of smoke and dust. And when this cloud had cleared away, he saw that one of the besiegers’ guns had been temporarily put clean out of action, for the right wheel was blown completely away, and the gun itself was lying on its side, half-buried in the sand; while, as for the crew who had been working it, so far as he could ascertain they had been blown completely out of existence, for there was no visible sign of them.