"Or what is more likely," interrupted Tarling, "than that he would put the blame for the robberies upon the girl and trust to her paying a price to Thornton Lyne to escape punishment?"

"Right again. I'll accept that possibility," said Whiteside. "Milburgh's plan is to get a private interview, under exceptionally favourable circumstances, with Thornton Lyne. He wires to that gentleman to meet him at Miss Rider's flat, relying upon the magic of the name."

"And Thornton Lyne comes in list slippers," said Tarling sarcastically. "That doesn't wash, Whiteside."

"No, it doesn't," admitted the other. "But I'm getting at the broad aspects of the case. Lyne comes. He is met by Milburgh, who plays his trump card of confession and endeavours to switch the young man on to the solution which Milburgh had prepared. Lyne refuses, there is a row, and is desperation Milburgh shoots Thornton Lyne."

Tarling shook his head. He mused a while, then:

"It's queer," he said.

The door opened and a police officer came in.

"Here are the particulars you want," he said and handed Whiteside a typewritten sheet of paper.

"What is this?" said Whiteside when the man had gone. "Oh, here is our old friend, Sam Stay. A police description." He read on: "Height five foot four, sallow complexion ... wearing a grey suit and underclothing bearing the markings of the County Asylum.... Hullo!"

"What is it?" said Tarling.