and driven away. On some previous night the same car had driven away and
brought back the duplicate coffin."

"The chauffeur said the car had not been out for a week," I said.

"So far as he knew," Quarles returned. "It was cleaned afterwards. There
is a shutter to the window in Connaught Road, and over the window looking
into the garden one of the towels had been nailed, clumsily, and with
large nails which were still on a shelf. I found the towel with the nail
holes in it."

"Where was the body taken?" asked Zena.

"That I do not know."

"And what was the use of it to any one?"

"Ah, I think I can answer that," said Quarles. "I had an interesting talk
with Dr. Coles after I left you to-day, Wigan. He told me he was not
altogether surprised at Sir Grenville's sudden collapse. The attack of
influenza was comparatively slight, but when Mr. Thompson arrived
unexpectedly from India it was evident to the doctor that he had brought
bad news. Both Sir Grenville and his wife were worried. Coles says Sir
Grenville was a man of a nervous temperament, who would have been utterly
lost without his wife. The doctor believes the sudden worry occasioned
the collapse."

"He had no suspicion of suicide, I suppose?"

"As a matter of form I put the question to him. I even suggested the