“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 absent-minded 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 him a gentleman, while the gentlemen thought him a waiter.  The rest went like winking.  If any waiter caught him away from the table, that waiter caught a languid aristocrat.  He had only to time himself two minutes before the fish was cleared, become a swift servant, and clear it himself.  He put the plates down on a sideboard, stuffed the silver in his breast pocket, giving it a bulgy look, and ran like a hare (I heard him coming) till he came to the cloak room.  There he had only to be a plutocrat again—­a plutocrat called away suddenly on business.  He had only to give his ticket to the cloak-room attendant, and go out again elegantly as he had come in.  Only—­only I happened to be the cloak-room attendant.”