Colonel Pound looked at him keenly, but the speaker’s mild grey eyes were fixed upon the ceiling with almost empty wistfulness.
“A crime,” he said slowly, “is like any other work of art. Don’t look surprised; crimes are by no means the only works of art that come from an infernal workshop. But every work of art, divine or diabolic, has one indispensable mark—I mean, that the centre of it is simple, however much the fulfilment may be complicated. Thus, in Hamlet, let us say, the grotesqueness of the gravedigger, the flowers of the mad girl, the fantastic finery of Osric, the pallor of the ghost and the grin of the skull are all oddities in a sort of tangled wreath round one plain tragic figure of a man in black. Well, this also,” he said, getting slowly down from his seat with a smile, “this also is the plain tragedy of a man in black. Yes,” he went on, seeing the colonel look up in some wonder, “the whole of this tale turns on a black coat. In this, as in Hamlet, there are the rococo excrescences—yourselves, let us say. There is the dead waiter, who was there when he could not be there. There is the invisible hand that swept your table clear of silver and melted into air. But every clever crime is founded ultimately on some one quite simple fact—some fact that is not itself mysterious. The mystification comes in covering it up, in leading men’s thoughts away from it. This large and subtle and (in the ordinary course) most profitable crime, was built on the plain fact that a gentleman’s evening dress is the same as a waiter’s. All the rest was acting, and thundering good acting, too.”
“Still,” said the colonel, getting up and frowning at his boots, “I am not sure that I understand.”
“Colonel,” said Father Brown, “I tell you that this archangel of impudence who stole your forks walked up and down this passage twenty times in the blaze of all the lamps, in the glare of all the eyes. He did not go and hide in dim corners where suspicion might have searched for him. He kept constantly on the move in the lighted corridors, and everywhere that he went he seemed to be there by right. Don’t ask me what he was like; you have seen him yourself six or seven times tonight. You were waiting with all the other grand people in the reception room at the end of the passage there, with the terrace just beyond. Whenever he came among you gentlemen, he came in the lightning style of a waiter, with bent head, flapping napkin and flying feet. He shot out on to the terrace, did something to the table cloth, and shot back again towards the office and the waiters’ quarters. By the time he had come under the eye of the office clerk and the waiters he had become another man in every inch of his body, in every instinctive gesture. He strolled among the servants with the absentminded insolence which they have all seen in their patrons. It was no new thing to them that a swell from the dinner party should pace all parts of the house like an animal at the Zoo; they know that nothing marks the Smart Set more than a habit of walking where one chooses. When he was magnificently weary of walking down that particular passage he would wheel round and pace back past the office; in the shadow of the arch just beyond he was altered as by a blast of magic, and went hurrying forward again among the Twelve Fishermen, an obsequious attendant. Why should the gentlemen look at a chance waiter? Why should the waiters suspect a first-rate walking gentleman? Once or twice he played the coolest tricks. In the proprietor’s private quarters he called out breezily for a syphon of soda water, saying he was thirsty. He said genially that he would carry it himself, and he did; he carried it quickly and correctly through the thick of you, a waiter with an obvious errand. Of course, it could not have been kept up long, but it only had to be kept up till the end of the fish course.
“His worst moment was when the waiters stood in a row; but even then he contrived to lean against the wall just round the corner in such a way that for that important instant the waiters thought