"Since he vanished, have you been conducting his business?"
"Oh, yes. I'm capable of doing it. In fact, even when he was here I've been in the habit of attending to most all of it. He recently hasn't done much more than sign checks."
"Since he vanished, have you been here every day?"
"Certainly I have."
"Haven't been out of town at all, eh?"
"I had no occasion to."
"No?" asked the detective, with a smile.
"No!" retorted Mason, sharply.
"Do you know Sim Johnson, your uncle's valet?"
"Of course I do."