"Dr. Penberthy has vetted him from time to time, I think," put in Wimsey, suddenly. "Why not send for him?"
Parker gasped involuntarily.
"He might be able to throw some light on the symptoms," said Wimsey, in a rigid voice.
Parker nodded.
"A good idea," he agreed. He moved to the telephone. George smiled as his wife put her arm about his shoulder.
"Tired," he said, "very tired. Off to bed, old girl."
A police-constable opened the door to them, and they started through it together; George leaned heavily on Sheila; his feet dragged.
"Let's have a look at his statement," said Parker.
It was written in a staggering handwriting, much blotted and erased, with words left out and repeated here and there.
"I am making this statement quickly while he is asleep, because if I wait he may wake up and stop me. You will say I was moved and seduced by instigation of but what they will not understand is that he is me and I am him. I killed my grandfather by giving him digitalin. I did not remember it till I saw the name on the bottle, but they have been looking for me ever since, so I know that he must have done it. That is why they began following me about, but he is very clever and misleads them. When he is awake. We were dancing all last night and that is why he is tired. He told me to smash the bottle so that you shouldn't find out, but they know I was the last person to see him. He is very cunning, but if you creep on him quickly now that he is asleep you will be able to bind him in chains and cast him into the pit and then I shall be able to sleep.