Recognising he had failed for the moment, French set himself to calm the other’s anxieties before taking his leave. He pretended to accept the young man’s statement, saying he was afraid his journey had proved a wild-goose chase, and that he would now have to interview the other persons whose names he had obtained from Cook’s. Whether his efforts were successful he wasn’t sure, but the look of relief on Whymper’s face made him think so. Outwardly at all events both men seemed to consider the incident closed when, after French had again warned the other as to secrecy, they bade each other good-night.

But to French it was very far indeed from being closed. He saw that the matter must be probed to the bottom. There was, however, nothing he could do that night except to take one obvious precaution. Whymper must be watched, and going to the police station he surprised Sergeant Kent considerably by asking him to put the young man under careful surveillance.

This precaution was a bow drawn at a venture, but to French’s surprise and delight, on the very next day it proved that the arrow had found its way between the joints of Whymper’s harness. While he was breakfasting a note was brought to him from Kent. In it the sergeant said that as a result of the order to put a watch on Whymper, Constable Sheldrake had made a statement which he, Kent, thought the inspector should hear. Sheldrake said that on the evening of the fire he had spent a couple of his free hours in taking a walk in the direction of Starvel with a friend of his, a young lady. Between half-past nine and ten the two were approaching the junction where the Starvel lane diverged from the road which circled round the outside of the hollow, when they heard steps approaching. Not wishing to be observed, they had slipped behind some bushes, and they had seen a man coming from the Starvel lane. He had passed close to them, and by the light of the moon Constable Sheldrake had not only recognised Whymper, but had seen that his face bore an expression of horror and distress. At the time there was no suspicion either of Whymper or of foul play at Starvel, and the constable, not wishing to be chaffed about the girl, had not mentioned the matter. But now he believed it to be his duty to come forward with his report.

Here was food for thought. The Starvel lane after passing through the Hollow almost petered out. As a rough track it wound on past one or two isolated cottages, debouching at last into a cross road some four miles farther on. It was therefore most unlikely that Whymper could have been coming from anywhere except Starvel. But if he had been coming from Starvel he had lied, as he had stated that he had not been there within a week of the fire.

This fact made French’s next step all the more imperative. He went down to the police station and saw Kent.

“Look here, sergeant,” he explained, “I want to search that young man’s rooms and I want your help. Will you do two things for me? First, I want you to find out at what time he goes home in the evening and let me know, and second to make some pretext to keep him half an hour later than usual at the church to-night. Can you manage that?”

“Of course, Mr. French. You may count on me.”

Kent was as good as his word. When French returned to the hotel in the afternoon a note was waiting for him, saying that Whymper always reached home about six. Accordingly ten minutes before six found French once more knocking at the door of 12 Stanhope Terrace.

“Has Mr. Whymper come back yet?” he asked the stout, good-humoured looking landlady.

She recognised her visitor of the night before and smiled.