One of the most heart-rending accidents of this character which has been recorded for some time, has just occurred at the Empire mine, in this vicinity. Two men, named John Mooney and Patrick Quinn, were employed in No. 4 slope, laying track, a distance of about two miles from the opening, and a mile from the other workmen. When they least dreamed of danger there was a sudden convulsion overhead, and an instant later they were overwhelmed by a fearful fall of roof. The terrible accident put out their lights, and they were in utter darkness. Mooney, after considerable difficulty, succeeded in extricating himself from among the massive bowlders which fell about him, in such a way as to form a sort of cave, and, upon freeing himself, his first thought was for his companion. He called aloud for Quinn, but received no answer, only the echo of his own voice, beaten back by the rocks. He felt himself growing faint, and realized that he was very seriously injured, but was determined to ascertain the condition of his fellow miner. After calling aloud in vain for some time, he groped about in the dismal place among the rocks, hoping to find Quinn, and fearing that he was dead. At length he touched him, but the poor fellow was pinned fast by a big bowlder, which lay upon one of his mangled legs. The other leg had been completely severed from the body by the fall. To release him was a hard task, but Mooney, forgetting his own injuries, set about the work with a will, and succeeded in setting Quinn free. How to carry him to the light of day was the next trial, but he was determined to do it; and taking him upon his back, he began groping his way through the pitchy darkness, in the direction of what he considered was the foot of the slope. For two hours he wandered about that living tomb, with his dying comrade on his back, moaning in the most piteous manner. The situation was awful, and, after roaming thus for a long time, poor Mooney was disheartened to find that he had come back to the very point from which he had set out, and where the accident occurred. He summoned up his fast-fading strength and made another effort, still taking Quinn on his back; but, after proceeding a short distance, he grew faint, and was unable to go farther with his precious burden. Then, laying the dying man down in as comfortable a position as he could, Mooney crawled on his hands and knees toward what he thought was the slope. At half-past six o’clock a party of miners, while proceeding down No. 5 slope, were startled by the apparition which their lamps revealed. It was Mooney, crawling slowly up the slope on his hands and knees, his face black and bloody, and his whole body sore from contact with the jagged pieces of coal and rock. His eyes were at first dazzled by the light, he had been in darkness so long, and trying to see, and he was speechless with joy for some seconds to find relief at last. [Sidenote: HEROISM AND MORTAL AGONY.]