They jumped, all together, like a well-trained chorus.

'Who is that?' cried Mr Abney. I could tell by the sound of his voice that his nerves were on wires. 'Who was that who spoke?'

'Shall I telephone for the police?' asked Glossop. Ignored.

'I am Mrs Sheridan, Mr Abney. You were expecting me to-night.'

'Mrs Sheridan? Mrs Sher—I expected you in a cab. I expected you in—ah—in fact, a cab.'

'I walked.'

I had a curious sensation of having heard the voice before. When she had told me not to move, she had spoken in a whisper—or, to me, in my dazed state, it had sounded like a whisper—but now she was raising her voice, and there was a note in it that seemed familiar. It stirred some chord in my memory, and I waited to hear it again.

When it came it brought the same sensation, but nothing more definite. It left me groping for the clue.

'Here is one of the men, Mr Abney.'

There was a profound sensation. Boys who had ceased to squeal, squealed with fresh vigour. Glossop made his suggestion about the telephone with a new ring of hope in his voice. Mrs Attwell shrieked. They made for us in a body, boys and all, White leading with the lantern. I was almost sorry for being compelled to provide an anticlimax.