Meantime Captain Johnson was dragging out a wretched existence in Rat Hell, and for safety was obliged to confine himself by day to the dark north end, for the Confederates often came into the place very suddenly through the south entrance. When they ventured too close, Johnson would get into a pit that he had dug under the straw as a hiding-hole both for himself and the tunnelers' tools, and quickly cover himself with a huge heap of short packing-straw. A score of times he came near being stepped upon by the Confederates, and more than once the dust of the straw compelled him to sneeze in their very presence.

On Saturday, February 6, a larger party than usual of the Confederates came into the cellar, walked by the very mouth, of the tunnel, and seemed to be making a critical survey of the entire place. They remained an unusually long time and conversed in low tones; several of them even kicked the loose straw about; and in fact everything seemed to indicate to Johnson—who was the only one of the working party now in the cellar—that the long-averted discovery had been made. That night he reported matters fully to Rose at the fireplace opening.

The tunnel was now nearly completed, and when Rose conveyed Johnson's message to the party it caused dismay. Even the stout-hearted Hamilton was for once excited, and the leader whose unflinching fortitude had thus far inspired his little band had his brave spirits dashed. But his buoyant courage rose quickly to its high and natural level. He could not longer doubt that the suspicions of the Confederates were aroused, but he felt convinced that these suspicions had not as yet assumed such a definite shape as most of his companions thought; still, he had abundant reason to believe that the success of the tunnel absolutely demanded its speedy completion, and he now firmly resolved that a desperate effort should be made to that end. Remembering that the next day was Sunday, and that it was not customary for the Confederates to visit the operating-cellar on that day, he determined to make the most in his power of the now precious time. He therefore caused all the party to remain up-stairs, directing them to keep a close watch upon the Confederates from all available points of observation, to avoid being seen in whispering groups,—in short, to avoid all things calculated to excite the curiosity of friends or the suspicion of enemies,—and to await his return.

Taking McDonald with him, he went down through the fireplace before daylight on Sunday morning, and, bidding Johnson to keep a vigilant watch for intruders and McDonald to fan air into him, he entered the tunnel and began the forlorn hope. From this time forward he never once turned over the chisel to a relief.

All day long he worked with the tireless patience of a beaver. When night came, even his single helper, who performed the double duty of fanning air and hiding the excavated earth, was ill from his hard, long task and the deadly air of the cellar. Yet this was as nothing compared with the fatigue of the duty that Rose had performed; and when at last, far into the night, he backed into the cellar, he had scarcely strength enough to stagger across to the rope-ladder.

He had made more than double the distance that had been accomplished under the system of reliefs on any previous day, and the non-appearance of the Confederates encouraged the hope that another day, without interruption, would see the work completed. He therefore determined to refresh himself by a night's sleep for the finish. The drooping spirits of his party were revived by the report of his progress and his unalterable confidence.

Monday morning dawned, and the great prison with its twelve hundred captives was again astir. The general crowd did not suspect the suppressed excitement and anxiety of the little party that waited through that interminable day, which they felt must determine the fate of their project.

Rose had repeated the instructions of the day before, and again descended to Rat Hell with McDonald for his only helper. Johnson reported all quiet, and McDonald taking up his former duties at the tunnel's mouth, Rose once more entered with his chisel. It was now the seventeenth day since the present tunnel was begun, and he resolved it should be the last. Hour after hour passed, and still the busy chisel was plied, and still the little wooden box with its freight of earth made its monotonous trips from the digger to his comrade and back again.

From the early morning of Monday, February 8, 1864, until an hour after midnight the next morning his work went on. As midnight approached, Rose was nearly a physical wreck: the perspiration dripped from every pore of his exhausted body; food he could not have eaten, if he had had it. His labors thus far had given him a somewhat exaggerated estimate of his physical powers. The sensation of fainting was strange to him, but his staggering senses warned him that to faint where he was meant at once his death and burial. He could scarcely inflate his lungs with the poisonous air of the pit; his muscles quivered with increasing weakness and the warning spasmodic tremor which their unnatural strain induced; his head swam like that of a drowning person.

By midnight he had struck and passed beyond a post which he felt must be in the yard. During the last few minutes he had directed his course upward, and to relieve his cramped limbs he turned upon his back. His strength was nearly gone; the feeble stream of air which his comrade was trying, with all his might, to send to him from a distance of fifty-three feet could no longer reach him through the deadly stench. His senses reeled; he had not breath or strength enough to move backward through his narrow grave. In the agony of suffocation he dropped the dull chisel and beat his two fists against the roof of his grave with the might of despair—when, blessed boon! the crust gave way and the loosened earth showered upon his dripping face purple with agony; his famished eye caught sight of a radiant star in the blue vault above him; a flood of light and a volume of cool, delicious air poured over him. At that very instant the sentinel's cry rang out like a prophecy—"Half-past one, and all's well!"