Sheila agreed that this was a common experience, and after the interchange of a few commonplaces, Mrs Saxton took leave. She renewed her expressions of sympathy, and begged Miss Monkton to make use of her in any way, if she thought she could render assistance.

What had been the motive of her visit? To reiterate the slenderness of her knowledge of the man Stent, so that the fact would be communicated to Smeaton? Or had she hoped to find an artless and impressionable girl, who would confide to her all that had been done, up to the present, to unravel the mystery of Monkton’s disappearance?

If so, she had signally failed. She had gone away, having learned nothing. And Sheila had put no questions herself, although she was burning to ask her: “Who is that man at Brighton to whom you sent the telegram of warning?”

It had been a day of surprises, and events proceeded very rapidly, mostly in the direction of disappointments.

In the first place, Smeaton was rung up from Brighton by Wingate, who reported the failure of his attempt to get hold of the telegram, and asked for further instructions.

The detective mused a few moments before replying. He placed little or no reliance on the efforts of amateurs, however full of zeal. Still, the young man was there, and he might as well make use of him.

“Would it be inconveniencing you to spend a few more hours down there?” he asked at length over the wire from his room at Scotland Yard.

The reply was what might be expected. Wingate would be only too happy to place himself entirely at Smeaton’s disposal.

“Thanks. In that case, I would ask you to keep a watch on the post-office for as long as you think worth while. This fellow will be pretty certain to call again in an hour or two for another wire. You may depend their correspondence has not finished with that first telegram.”

So that was settled; it was a toss-up whether or not anything would result from Wingate’s observations.