Mason nodded, and regarded the chief inspector with tight-lipped satisfaction. Rampole saw him for the first time in full light. He had removed his soggy hat and waterproof, and flung them on a bench; evidently there was about him none of that fussiness which is associated with the brass hat. Now he stood warming his hands at the fire, and peering round his shoulder at Hadley.

`Well?' he demanded. `What's the first step' now?'

Dalrye put down his papers on the table,

`I think you'd better know,' he said, speaking between Mason and Sir William. `There are two people here among the visitors who are certain to have an interest in this. They're over with the others in the Warders' Hall, I wish you'd give me instructions, sir. Mrs Bitton has been raising the devil ever since…'

`Who?' demanded Sir William. He had been staring at the fire, and he lifted his head suddenly.

`Mrs Lester Bitton. As I say, she's been — '

Sir William rumpled his white pompadour and looked blankly at Mason. `My sister-in-law… What on earth would she be doing here?'

Hadley had sat, down at his desk, and was arranging note-book, pencil, and flashlight in a line with the utmost precision He glanced up with mild interest.

`Ah,' he said, `I'm glad to hear it. It centres our efforts, so to speak. But don't trouble her for the moment, Mr Dalrye; we can see her presently.' He folded his hands and contemplated Sir William, a wrinkle between his brows. `Why does it surprise you that Mrs Lester Bitton should be here?'

`Why, you know…' Sir William began in some perplexity, and broke off. `No. As a matter of fact, you don't know her, do you? Well she's of the sporting type; you'll' see. I say, did you tell her about… about Philip, Bob?' He spoke hesitantly.