He waited, in the dark archway beneath the crazy jumble of houses, with the sudden voices and footfalls of the midnight city echoing from time to time in the dark streets beyond. He waited and waited and waited. Now and then a dog or a cat rushed by him, startling him. Then, after twenty minutes or so, he wearied of waiting. Weariness and curiosity defeated caution; he pulled up the trap-door by its ring and peered down into blackness. Blackness, stillness, emptiness, and a queer, mouldy smell. Henry sat on the hole's edge for a full minute, dangling his legs. Then, catching his breath a little (it may or may not have been mentioned that Henry was not very brave), he swung himself down on to a hard, earthy floor. It was a tunnel he was in; a passage about six feet high and four feet wide. How many feet or yards long was a more difficult and a much more interesting question. Feet? Yards? It might be miles. Henry's imagination bored through the impenetrable dark in front of the little moon thrown by his electric torch; through and along, through and along, towards what? The horrid four who had preceded him--where were they? Did they lurk, planning some evil, farther along the tunnel, just out of earshot? Or had they emerged by some other exit? Or were they even now returning, to meet Henry in a moment face to face, to brush by him as he pressed against the damp brick wall, to turn on him suddenly that swimming moon of light ... and then what? Charles Wilbraham was no taker of human life, Henry felt assured. He was too prudent, too respectable, too much the civil servant. M. Kratzky, on the other hand, _was_ a taker of human life--he did it as naturally as others would slay midges; while he breathed he slew. If Henry should be discovered spying, M. Kratzky's counsels would be all for making forthwith an end of Henry. Sir John Levis was an armament knight: members of the staff of the _British Bolshevist_ needed not to know more of him than that: the Calvinist minister was either a Calvinist minister, and that was bad, or a master-criminal of the underworld disguised as a Calvinist minister, and that was worse. Or both of these. Four master-criminals of the underworld--these intriguing, appalling creatures, so common in the best fiction, so rare even in the worst life--if one were to meet four of them together in a subterranean passage.... Could human flesh and nerves endure it? Henry, with his shuddering dislike of seeing even a goldfish injured or slain, shrank far more shudderingly from being injured or slain himself. The horrid wrench that physical assault was--and then, perhaps, the sharp break with life, the plunge into a blank unknown--and never to see again on this earth the person whom one very greatly loved.... As has been said, Henry was not brave. But he was, after all, a journalist on the scent of a story, and that takes one far; he was also a hunter in pursuit of a hated quarry, and that takes one farther.