but for some reason it did not act
He waited a little while, then withdrew to a shrubbery opposite the door on the other side of the drive up which the cyclist had come. He had not long to wait before the door under the portico opened again and closed. Somebody jumped on to the bicycle as Tarling leaped from his place of concealment. He pressed the key of his electric lamp, but for some reason it did not act. He felt rather than heard a shiver of surprise from the person on the machine.
“I want you,” said Tarling, and put out his hands.
He missed the rider by the fraction of an inch, but saw the machine swerve and heard the soft thud of something falling. A second later the machine and rider had disappeared in the pitch darkness.
He re-fixed his lamp. Pursuit, he knew, was useless without his lantern, and, cursing the maker thereof, he adjusted another battery, and put the light on the ground to see what it was that the fugitive had dropped. He thought he heard a smothered exclamation behind him and turned swiftly. But nobody came within the radius of his lamp. He must be getting nervy, he thought, and continued his inspection of the wallet.
It was a long, leather portfolio, about ten inches in length and five inches in depth, and it was strangely heavy. He picked it up, felt for the clasp, and found instead two tiny locks. He made another examination by the light of his lantern, an examination which was interrupted by a challenge from above.
“Who are you?”
It was Mrs. Rider’s voice, and just then it was inconvenient for him to reveal himself. Without a word in answer, he switched off his light and slipped into the bushes, and, more as the result of instinct than judgment, regained the wall, at almost the exact spot he had crossed it.