“Sir?”

“This is a doctor’s carriage, isn’t it?”

“Yes, sir. Doctor Mayson.”

“Well, I say, has he been here long?”

“About an hour, sir, or a little more.”

“Thanks.”

Dion turned again and assaulted the latchkey.

But he had to ring the bell to get in. When the maid came, looking excited, he said:

“I don’t know what on earth’s the matter with this key. I can’t either turn it or get it out.”

“No, sir?”