The road in question was a long one, leading right out of the town. According to the porter’s instructions, Hurstmere was the last house. Anthony trudged along steadily. The little pucker had reappeared between his eyes. Nevertheless there was a new elation in his manner, as always when danger was near at hand.

Hurstmere was, as the porter had said, the last house in Langly Road. It stood well back, enclosed in its own grounds, which were ragged and overgrown. The place, Anthony judged, must have been empty for many years. A large iron gate swung rustily on its hinges, and the name on the gatepost was half obliterated.

“A lonely spot,” muttered Anthony to himself, “and a good one to choose.”

He hesitated a minute or two, glanced quickly up and down the road—which was quite deserted—and then slipped quietly past the creaking gate into the overgrown drive. He walked up it a little way, and then stood listening. He was still some distance from the house. Not a sound could be heard anywhere. Some fast yellowing leaves detached themselves from one of the trees overhead and fell with a soft rustling sound that was almost sinister in the stillness. Anthony started; then smiled.

“Nerves,” he murmured to himself. “Never knew I had such things before.”

He went on up the drive. Presently, as the drive curved, he slipped into the shrubbery and so continued his way unseen from the house. Suddenly he stood still, peering out through the leaves. Some distance away a dog was barking, but it was a sound nearer at hand that had attracted Anthony’s attention.

His keen hearing had not been mistaken. A man came rapidly round the corner of the house, a short square, thickset man, foreign in appearance. He did not pause but walked steadily on, circling the house and disappearing again.

Anthony nodded to himself.

“Sentry,” he murmured. “They do the thing quite well.”

As soon as he had passed, Anthony went on, diverging to the left, and so following in the footsteps of the sentry.