"Can you describe this man's appearance?"

"I cannot, having never met him."

"Will you describe the stranger who is reported to have called in the afternoon."

"He was tall, quite pale, with dark hair and moustache. He was dressed in a tweed suit, somewhat travel-worn, and wore dark glasses."

"Did he state his errand?"

"Only that he wished to see Mr. Mainwaring on business of special importance. He at first seemed rather insistent, but, on learning that Mr. Mainwaring was out and that he would receive no business calls for a day or two, he readily consented to defer his interview until later."

"Did he leave his name or address?"

"His card bore the name of J. Henry Carruthers, of London. He gave his present address as the Arlington House."

"You noticed nothing unusual in his appearance?"

"The only thing that struck me as rather peculiar was that Mr. Carruthers seemed well informed regarding events expected to take place here, while his name was wholly unfamiliar to Mr. Mainwaring."