The Incredulity of Father Brown

nobody else, why it is I have to be careful about mentioning that matter in mixed company; and why, the more eager they are to talk about it, the more cautious I have to be. It is also stated that in the coffin is a chain with a cross, common enough to look at, but with a certain secret symbol on the back found on only one other cross in the world. It is from the arcana of the very earliest Church and is supposed to indicate St. Peter setting up his See at Antioch before he came to Rome. Anyhow, I believe there is but one other like it, and it belongs to me. I hear there is some story about a curse on it; but I take no notice of that. But whether or no there is a curse, there really is, in one sense, a conspiracy; though the conspiracy should only consist of one man.”

“Of one man?” repeated Father Brown almost mechanically.

“Of one madman, for all I know,” said Professor Smaill. “It’s a long story and in some ways a silly one.”

He paused again, tracing plans like architectural drawings with his finger on the cloth, and then resumed:

“Perhaps I had better tell you about it from the beginning, in case you see some little point in the story that is meaningless to me. It began years and years ago, when I was conducting some investigations on my own account in the antiquities of Crete and the Greek islands. I did a great deal of it practically singlehanded; sometimes with the most rude and temporary help from the inhabitants of the place, and sometimes literally alone. It was under the latter circumstances that I found a maze of subterranean passages which led at last to a heap of rich refuse, broken ornaments and scattered gems which I took to be the ruins of some sunken altar, and in which I found the curious gold cross. I turned it over, and on the back of it I saw the Ichthus or fish, which was an early Christian symbol, but of a shape and pattern rather different from that commonly found; and, as it seemed to me, more realistic⁠—more as if the archaic designer had meant it to be not merely a conventional enclosure or nimbus, but to look a little more like a real fish. It seemed to me that there was a flattening towards one end of it that was not like mere mathematical decoration, but rather like a sort of rude or even savage zoology.

“In order to explain very briefly why I thought this find important, I must tell you the point of the excavation. For one thing, it had something of the nature of an excavation of an excavation. We were on the track not only of antiquities, but of the antiquarians of antiquity. We had reason to believe, or some of us thought we had reason to believe, that these underground passages, mostly of the Minoan period, like that famous one which is actually identified with the labyrinth of the Minotaur, had not really been lost and left undisturbed for all the ages between the Minotaur and the modern explorer. We believed that these underground places, I might almost say these underground towns and villages, had already been penetrated during the intervening period by some persons prompted by some motive. About the motive there were different schools of thought: some holding that the Emperors had ordered an official exploration out of mere scientific curiosity; others that the furious fashion in the later Roman Empire for all sorts of lurid Asiatic superstitions had started some nameless Manichaean sect or other rioting in the caverns in orgies that had to be hidden from the face of the sun. I belong to the group which believed that these caverns had been used in the same way as the catacombs. That is, we believed that, during some of the persecutions which spread like a fire over the whole Empire, the Christians had concealed themselves in these ancient pagan labyrinths of stone. It was therefore with a thrill as sharp as a thunderclap that I found and picked up the fallen golden cross and saw the design upon it; and it was with still more of a shock of felicity that, on turning to make my way once more outwards and upwards into the light of day, I looked up at the walls of bare rock that extended endlessly along the low passages, and saw scratched in yet ruder outline, but if possible more unmistakable, the shape of the Fish.

“Something about it made it seem as if it might be a fossil fish or some rudimentary organism fixed forever in a frozen sea. I could not analyse this analogy, otherwise unconnected with a mere drawing scratched upon the stone, till I realized that I was saying in my subconscious mind that the first Christians must have seemed something like fish, dumb and dwelling in a fallen world of twilight and silence, dropped far below the feet of men and moving in dark and twilight and a soundless world.

“Everyone walking along stone passages knows what it is to be followed by phantom feet. The echo follows flapping or clapping behind or in front, so that it is almost impossible for the man who is really lonely to believe in his loneliness. I had got used to the effects of this echo and had not noticed it much for some time past, when I caught sight of the symbolical shape scrawled on the wall of rock. I stopped, and at the same instant it seemed as if my heart stopped too. For my own feet had halted, but the echo went marching on.

“I ran forward, and it seemed as if the ghostly footsteps ran also, but not with that exact imitation which marks the material reverberation of a sound. I stopped again, and the steps stopped also; but I could have sworn they