answered the man; "them that go to Hampstead."
Valentin produced his official card and said very rapidly: "Call up two of your men to come with me in pursuit," and crossed the road with such contagious energy that the ponderous policeman was moved to almost agile obedience. In a minute and a half the French detective was joined on the opposite pavement by an inspector and a man in plain clothes.
"Well, sir," began the former, with smiling importance, "and what may—?"
Valentin pointed suddenly with his cane. "I'll tell you on the top of that omnibus," he said, and was darting and dodging across the tangle of the traffic. When all three sank panting on the top seats of the yellow vehicle, the inspector said: "We could go four times as quick in a taxi."
"Quite true," replied their leader placidly, "if we only had an idea of where we were going."
"Well, where are you going?" asked the other, staring.
Valentin smoked frowningly for a few seconds; then, removing his cigarette, he said: "If you know what a man's doing, get in front of him; but if you want to guess what he's doing, keep behind him. Stray when he strays; stop when he stops; travel as slowly as he. Then you may see what he saw and may act as he acted. All we can do is to keep our eyes skinned for a queer thing."
"What sort of queer thing do you mean?" asked the inspector.
"Any sort of queer thing," answered Valentin, and relapsed into obstinate silence.
The yellow omnibus crawled up the northern roads for what seemed like hours on end; the great detective would not explain further, and perhaps his assistants felt a silent and growing doubt of his errand. Perhaps, also, they felt a silent and growing desire for lunch, for the hours crept long past the normal luncheon hour, and the long roads of the North London suburbs seemed to shoot out into length after length like an infernal telescope. It was one of those journeys on which a man perpetually feels that now at last he must have come to the end of the universe, and then finds he has only come to the beginning of Tufnell Park. London died away in draggled taverns and dreary scrubs, and then was unaccountably born again in blazing high streets and blatant hotels. It was like passing through thirteen separate vulgar cities all just touching each other. But though the winter twilight was already threatening the road ahead of them, the Parisian detective still sat silent and watchful, eyeing the frontage of the streets that slid by on either side. By the time they had left Camden Town behind, the policemen were nearly asleep; at least, they gave something like a jump as Valentin leapt erect, struck a hand on each man's shoulder, and shouted to the driver to stop.
They tumbled down the steps into the road without realising why they had been dislodged; when they looked round for enlightenment they found Valentin triumphantly pointing his finger towards a window on the left side of the road. It was a large window, forming part of the long facade of a gilt and palatial public-house; it was the part reserved for respectable dining, and labelled "Restaurant." This window, like all the rest along the frontage of the hotel, was of frosted and figured glass; but in the middle of it was a big, black smash, like a star in the ice.
"Our cue at last," cried Valentin, waving his stick; "the place with the broken window."
"What window? What cue?" asked his principal assistant. "Why, what proof is there that this has anything to do with them?"
Valentin almost broke his bamboo stick with rage.
"Proof!" he cried. "Good God! the man is looking for proof! Why, of course, the chances are twenty to one that it has nothing to do with them. But what else can we do? Don't you see we must either follow one wild possibility or else go home to bed?" He banged his way into the restaurant, followed by his companions, and they were soon seated at a late luncheon at a little table, and looked at the star of smashed glass from the inside. Not that it was very informative to them even then.
"Got your window broken, I see," said Valentin to the waiter as he paid the bill.
"Yes, sir," answered the attendant, bending busily over the change, to which Valentin silently added an enormous tip. The waiter straightened himself with mild but unmistakable animation.
"Ah, yes, sir," he said. "Very odd thing, that, sir."
"Indeed?" Tell us about it," said the detective with careless curiosity.
"Well, two gents in black came in," said the waiter; "two of those foreign parsons that are running about. They had a cheap and quiet little lunch, and one of them paid for it and went out. The other was just going out to join him when I looked at my change again and found he'd paid me more than three times too much. 'Here,' I says to the chap who was nearly out of the door, 'you've paid too much.' 'Oh,' he says, very cool, 'have we?' 'Yes,' I says, and picks up the bill to show him. Well, that was a knock-out."
"What do you mean?" asked his interlocutor.
"Well, I'd have sworn on seven Bibles that I'd put 4s. on that bill. But now I saw I'd put 14s., as plain as paint."
"Well?" cried Valentin, moving slowly, but with burning eyes, "and then?"
"The parson at the door he says all serene, 'Sorry to confuse your accounts, but it'll pay for the window.' 'What window?' I says. 'The one I'm going to break,' he says, and smashed that blessed pane with his umbrella."
All three inquirers made an exclamation; and the inspector said under his breath, "Are we after escaped lunatics?" The waiter went on with some relish for the ridiculous story:
"I was so knocked silly for a second, I couldn't do anything. The man marched out of the place and joined his friend just round the corner. Then they went so quick up Bullock Street that I couldn't catch them, though I ran round the bars to do it."
"Bullock Street," said the detective, and shot up that thoroughfare as quickly as the strange couple he pursued.
Their journey now took them through bare brick ways like tunnels; streets with few lights and even with few windows; streets that seemed built out of the blank backs of everything and everywhere. Dusk was deepening, and it was not easy even for the London policemen to guess in what exact direction they were treading. The inspector, however, was pretty certain that they would eventually strike some part of Hampstead Heath. Abruptly one bulging gas-lit window broke the blue twilight like a bull's-eye lantern; and Valentin stopped an instant before a little garish sweetstuff shop. After an instant's hesitation he went in; he stood amid the gaudy colours of the confectionery with entire gravity and bought thirteen chocolate cigars with a certain care. He was clearly preparing an opening; but he did not need one.
An angular, elderly young woman in the shop had regarded his elegant appearance with a merely automatic inquiry; but when she saw the door behind him blocked with the blue uniform of the inspector, her eyes seemed to wake up.
"Oh," she said, "if you've come about that parcel, I've sent it off already."
"Parcel?" repeated Valentin; and it was his turn to look inquiring.
"I mean the parcel the gentleman left—the clergyman gentleman."
"For goodness' sake," said Valentin, leaning forward with his first real confession of eagerness, "for Heaven's sake tell us what happened exactly."
"Well," said the woman a little doubtfully, "the clergymen came in about half an hour ago and bought some peppermints and talked a bit, and then went off towards the Heath. But a second after, one of them runs back into the shop and says, 'Have I left a parcel!' Well, I looked everywhere and couldn't see one; so he says, 'Never mind; but if it should turn up, please post it to this address,' and he left me the address and a shilling for my trouble. And sure enough, though I thought I'd looked everywhere, I found he'd left a brown paper parcel, so I posted it to the place he said. I can't remember the address now; it was somewhere in Westminster. But as the thing seemed so important, I thought perhaps the police had come about it."
"So they have," said Valentin shortly. "Is Hampstead Heath near here?"
"Straight on for fifteen minutes," said the woman, "and you'll come right out on the open." Valentin sprang out of the shop and began to run. The other detectives followed him at