Ronny sprang up. Jimmy followed him.

Dr. Cartwright was a thin, energetic young man with a clever face. He greeted them with a brief nod. Pongo, looking more serious and spectacled than ever, performed introductions.

“I understand you were a great friend of Mr. Wade’s,” the doctor said to Ronny.

“His greatest friend.”

“H’m. Well, this business seems straightforward enough. Sad, though. He looked a healthy young chap. Do you know if he was in the habit of taking stuff to make him sleep?”

“Make him sleep ?” Ronny stared. “He always slept like a top.”

“You never heard him complain of sleeplessness?”