Like ghosts returning to the bowels of the earth, they glided away, silently, soundlessly, and soon the silence of death hovered once again in the rock caverns of the Catacombs of St. Calixtus. In breathless suspense, utterly oblivious of the injury he had sustained, Tristan gazed into the deserted rock chamber where the dim light of the taper still flickered in a faint breath of air wafted from without. Hardly did the hearts of the Magi when the vision of the Star in the East first dawned upon their eyes experience a transport more vivid than that which animated Tristan when he found his terrible stress relieved. But almost immediately a reaction set in and a dire misgiving extinguished the quick ray of hope that had lighted his heart, luring him on to escape from these caverns of Death. By a strange mischance they had neglected to extinguish the taper. They might return at any moment and, his presence discovered, the doom in store for the intruder on their secret rites was not a matter of surmise. Composing himself to patience, Tristan waited, glaring as a caged tiger at the gates whose opening or closing might spell freedom or doom. At last, after a considerable lapse of time, moments that seemed eternity, he resolved to hazard the descent. Slowly and painfully moving, with the pace and perseverance of a turtle, he writhed downward upon his unguided course until he reached the bottom of the cavern. Breathless with exhaustion after his breakneck descent, he waited in the shadow of a projecting rock. When the deep sepulchral silence remained undisturbed, he advanced toward the fissure in the rock where one of the muffled company had placed the mysterious object. Tristan's quest was not at once rewarded. The shelving in the rock cavern, being irregular and almost indistinguishable, offered no clue to the mystery. A great fear was upon him, but he was determined, to discover the meaning of it all. Suddenly he paused. A small cabinet of sandal wood, concealed behind the jutting stone, had caught his eye. It was painted to resemble the rock and the untrained eye would not linger upon it. A small keyhole was revealed, but the key had been taken away. Tristan stood irresolute, with straining eyes and listening ear. Not a sound was audible. Even the piping of the night wind in the rock fissures seemed to have died to silence. With quick resolution he inserted one of the sharp-edged flints and gave a wrench. When the top receded he could not repress an outcry. A chill coursed coldly through his veins. His breath came and went in sobs, as from one half drowned. He only glanced at what was before him for the fraction of a second. But he knew what had made the very soul within him shudder and his bones grind, as if in mortal agony. It was as though Hell itself had opened the gates. He staggered back in a paroxysm of horror.--