“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