For it was by the time that he had reached these that the priest began a little to allow his thoughts to wander and his animal senses, which were commonly keen, to awaken. The time of darkness and dinner was drawing on; his own forgotten little room was without a light, and perhaps the gathering gloom, as occasionally happens, sharpened the sense of sound. As Father Brown wrote the last and least essential part of his document, he caught himself writing to the rhythm of a recurrent noise outside, just as one sometimes thinks to the tune of a railway train. When he became conscious of the thing he found what it was: only the ordinary patter of feet passing the door, which in an hotel was no very unlikely matter. Nevertheless, he stared at the darkened ceiling, and listened to the sound. After he had listened for a few seconds dreamily, he got to his feet and listened intently, with his head a little on one side. Then he sat down again and buried his brow in his hands, now not merely listening, but listening and thinking also.
The footsteps outside at any given moment were such as one might hear in any hotel; and yet, taken as a whole, there was something very strange about them. There were no other footsteps. It was always a very silent house, for the few familiar guests went at once to their own apartments, and the well-trained waiters were told to be almost invisible until they were wanted. One could not conceive any place where there was less reason to apprehend anything irregular. But these footsteps were so odd that one could not decide to call them regular or irregular. Father Brown followed them with his finger on the edge of the table, like a man trying to learn a tune on the piano.
First, there came a long rush of rapid little steps, such as a light man might make in winning a walking race. At a certain point they stopped and changed to a sort of slow, swinging stamp, numbering not a quarter of the steps, but occupying about the same time. The moment the last echoing stamp had died away would come again the run or ripple of light, hurrying feet, and then again the thud of the heavier walking. It was certainly the same pair of boots, partly because (as has been said) there were no other boots about, and partly because they had a small but unmistakable creak in them. Father Brown had the kind of head that cannot help asking questions; and on this apparently trivial question his head almost split. He had seen men run in order to jump. He had seen men run in order to slide. But why on earth should a man run in order to walk? Or, again, why should he walk in order to run? Yet no other description would cover the antics of this invisible pair of legs. The man was either walking very fast down one-half of the corridor in order to walk very slow down the other half; or he was walking very slow at one end to have the rapture of walking fast at the other. Neither suggestion seemed to make much sense. His brain was growing darker and darker, like his room.
Yet, as he began to think steadily, the very blackness of his cell seemed to make his thoughts more vivid; he began to see as in a kind of vision the fantastic feet capering along the corridor in unnatural or symbolic attitudes. Was it a heathen religious dance? Or some entirely new kind of scientific exercise? Father Brown began to ask himself with more exactness what the steps suggested. Taking the slow step first: it certainly was not the step of the proprietor. Men of his type walk with a rapid waddle, or they sit still. It could not be any servant or messenger waiting for directions. It did not sound like it. The poorer orders (in an oligarchy) sometimes lurch about when they are slightly drunk, but generally, and especially in such gorgeous scenes, they stand or sit in constrained attitudes. No; that heavy yet springy step, with a kind of careless emphasis, not specially noisy, yet not caring what noise it made, belonged to only one of the animals of this earth. It was a gentleman of western Europe, and probably one who had never worked for his living.
Just as he came to this solid certainty, the step changed to the quicker one, and ran past the door as feverishly as a rat. The listener remarked that though this step was much swifter it was also much more noiseless, almost as if the man were walking on tiptoe. Yet it was not associated in his mind with secrecy, but with something else—something that he could not remember. He was maddened by one of those half-memories that make a man feel half-witted. Surely he had heard that strange, swift walking somewhere. Suddenly he sprang to his feet with a new idea in his head, and walked to the door. His room had no direct outlet on the passage, but let on one side into the glass office, and on the other into the cloak room beyond. He tried the door into the office, and found it locked. Then he looked at the window, now a square pane full of purple cloud cleft by livid sunset, and for an instant he smelt evil as a dog smells rats.
The rational part of him (whether the wiser or not) regained its supremacy. He remembered that the proprietor had told him that he should lock the door, and would come later to release him. He told himself that twenty things he had not thought of might explain the eccentric sounds outside; he reminded himself that there was just enough light left to finish his own proper work. Bringing his paper to the window so as to catch the last stormy evening light, he resolutely plunged once more into the almost completed record. He had written for about twenty minutes, bending closer and closer to his paper in the lessening light; then suddenly he sat upright. He had heard the strange feet once more.
This time they had a third oddity. Previously the unknown man had walked, with levity indeed and lightning quickness, but he had walked. This time he ran. One could hear the swift, soft, bounding steps coming along the corridor, like the pads of a fleeing and leaping panther. Whoever was coming was a very strong, active man, in still yet tearing excitement. Yet, when the sound had swept up to the office like a sort of whispering whirlwind, it suddenly changed again to the old slow, swaggering stamp.
Father Brown flung down his paper, and, knowing the office door to be locked, went at once into the cloak room on the other side. The attendant of this place was temporarily absent, probably because the only guests were at dinner and his office was a sinecure. After groping through a grey forest of overcoats, he found that the dim cloak room opened on the lighted corridor in the form of a sort of counter or half-door, like most of the counters across which we have all handed umbrellas and received tickets. There was a light immediately above the semicircular arch of this opening. It threw little illumination on Father Brown himself, who seemed a mere dark outline against the dim sunset window behind him. But it threw an almost theatrical light on the man who stood outside the cloak room in the corridor.
He was an elegant man in very plain evening dress; tall, but with an air of not taking up much room; one felt that he could have slid along like a shadow where many smaller men would have been obvious and obstructive. His face, now flung back in the lamplight, was swarthy and vivacious, the face of a foreigner. His figure was good, his manners good humoured and confident; a critic could only say that his black coat was a shade below his figure and manners, and even bulged and bagged in an odd way. The moment he caught sight of Brown's black silhouette against the sunset, he tossed down a scrap of paper with a number and called out with amiable authority: "I want my hat and coat, please; I find I have to go away at once."
Father Brown took the paper without a word, and obediently went to look for the coat; it was not the first menial work he had done in his life. He brought it and laid it on the counter; meanwhile, the strange gentleman who had been feeling in his waistcoat pocket, said laughing: "I haven't got any silver; you can keep this." And he threw down half a sovereign, and caught up his coat.
Father Brown's figure remained quite dark and still; but in that instant he had lost his head. His head was always most valuable when he had lost it. In such moments he put two and two together and made four million. Often the Catholic Church (which is wedded to common sense) did not approve of it. Often he did not approve of it himself. But it was real inspiration—important at rare crises—when whosoever shall lose his head the same shall save it.
"I think, sir," he said civilly, "that you have some silver in your pocket."
The tall gentleman stared. "Hang it," he cried, "if I choose to give you gold, why should you complain?"
"Because silver is sometimes more valuable than gold," said the priest mildly; "that is, in large quantities."
The stranger looked at him curiously. Then he looked still more curiously up the passage towards the main entrance. Then he looked back at Brown again, and then he looked very carefully at the window beyond Brown's head, still coloured