"The murderer was not caught," Arnold told him. "No one seems to have seen him clearly, it all took place so quickly. He stole out of some corner where he must have been hiding, and he was gone before anyone had time to realize what was happening."

Mr. Weatherley had been standing up all this time, clutching nervously at his desk. He suddenly collapsed into his easy-chair. His face was gray, his mouth twitched as though he were about to have a stroke.

"My God!" he murmured. "Rosario dead! They had him, after all! They—killed him!"

"It was a great shock to every one," Arnold went on. "Mrs. Weatherley arrived about a quarter of an hour before it occurred. I understood that she was expecting to lunch with him, but when I told her why I was there she came and sat at my table. She was sitting there when it happened. She was very much upset indeed. I was detained looking after her."

Mr. Weatherley looked at him narrowly.

"I am sorry that she was there," he said. "She is not strong. She ought not to be subjected to such shocks."

"I left her with Mr. Starling," Arnold continued. "He was going to take her home."

"Was Starling lunching there?" Mr. Weatherley asked.

"We saw him afterwards, coming up from the restaurant," Arnold replied. "He did not seem to have been in the Grill Room at all."

Mr. Weatherley sat back in his chair and for several minutes he remained silent. His eyes were fixed upon vacancy, his lips moved once or twice, but he said nothing. He seemed, indeed, to have lost the power of speech.