The Incredulity of Father Brown
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 I 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 for ever 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 sub-conscious 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
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