Then his thoughts were just as suddenly switched from old recollections to present events. He was on the point of flashing his own lamp into the passage when the darkness was illuminated from the direction of the Head's door. That, too, was half open. The miscreant was inside. Now was the time to lay hands on him.
"Catch him nicely in a trap. That'll do," thought Clive. "He's coming out, though. What's he up to?"
The reflection from the walls of the passage threw into relief the figure of a man, gowned in something loose.
"Overcoat," said Clive. "Hat crammed on his head and rubbers on his feet. He's—he's pouring something along the sides of the passage. Paraffin. I can smell it! Jingo! Then this is the beggar! I've got him right in the middle of the act. This is what we've been waiting and watching for."
Yes, there could be no doubt now, for the penetrating odour of the oil was already filling his nostrils. But how silently the rascal worked! But for the faint whisper the tail of his coat made now and again as he stepped along the side of the passage there was not another sound. Clive watched the fluid pouring from the spout of the fellow's kettle as if he were fascinated. It spread slowly and greasily, as paraffin does invariably, across the woodwork and matting of the floor. It ran freely from the receptacle in which this rascal had brought it, and then slowly became less in quantity, till it merely dribbled from the spout. And all the while an elliptical, bright ray of light fell on the particular spot upon which the fluid was falling, the mere outline of the bending figure of the man being visible to the watcher. Suddenly the light went out. There was a faint scraping noise, as if the kettle had hit against the wall. Then the light flashed for a second again, and once more disappeared.
"Gone back into the Head's room. Now I have him," said Clive, whetting his lips. "It'll be a business, but I ain't going to be funked. This is a matter concerning the whole school, and I don't shirk it. All the same, I wish Masters were closer."
He rounded the door, flashed his own lamp for one instant so as to give him a view of the passage, and then went noiselessly onward. Outside the study door he waited and listened. Yes, someone was moving inside. He heard the faint rustle of papers. The fellow no doubt was piling them upon the pool of paraffin he had poured on to the floor. Or perhaps he was scattering the fluid broadcast. It was the moment to nab him. Clive stepped into the doorway and——
A blinding flash of light blazed right into his eyes. The bull's-eye of this ruffian's lamp was within ten inches of his face and suddenly opened upon him. There came a startled cry, a sudden movement, and the clatter of a kettle falling to the floor. Then Clive was dashed backward into the passage with terrific violence, and stumbling on the mat outside the study door, fell heavily on his back, his own electric torch clattering away into a corner. He felt the sweep of the fellow's gown or overcoat across his face and gripped swiftly for his legs. His hand closed on something, trousers perhaps, though the material seemed extraordinarily thin. Then he was kicked savagely, though the softness of his assailant's soles caused but little damage. But it threw his grip off, and in a moment the fellow was fleeing.
"Beaten me after all," thought Clive as he sprang to his feet and groped for his torch. "Ah, here's the thing. Now, which way did he bolt?"
He was out of the passage like a flash of lightning, and turned into the corridor. At once his finger went to the trigger of his torch and sent a beam ahead of him. Yes, there was a flying figure in advance, going at full speed down the corridor, and without making even the smallest sound. Clive gave chase instantly, first with the help of the light given him by his torch, and then in total darkness, for his finger had slipped from the trigger. But he had it on again in a moment. There the fellow was, plainly visible, his clothing blowing out behind him.