And, indeed, more quickly than might have been expected, Mr. Murbles made his appearance in a Jaeger dressing-gown at the front door.

"Come in, my dear. I will get dressed in a very few minutes. It was quite right of you to come to me. I'm very, very glad you did. What a terrible night! Perkins, would you kindly wake up Mr. Murphy and ask him to oblige me with the use of his telephone?"

Mr. Murphy—a noisy Irish barrister with a hearty manner—needed no waking. He was entertaining a party of friends, and was delighted to be of service.

"Is that you Biggs? Murbles speaking. That alibi—"

"Yes!"

"Has come along of its own accord."

"My God! You don't say so!"

"Can you come round to 110 Piccadilly?"

"Straight away."

It was a strange little party gathered round Lord Peter's fire—the white-faced woman, who started at every sound; the men of law, with their keen, disciplined faces; Lady Mary; Bunter, the efficient. Mrs. Grimethorpe's story was simple enough. She had suffered the torments of knowledge ever since Lord Peter had spoken to her. She had seized an hour when her husband was drunk in the "Lord in Glory," and had harnessed the horse and driven in to Stapley.