"Wait."
He stepped to a sideboard, drank a glass of brandy, and then resuming his former seat, said in a perfectly cool tone:
"This is a very remarkable piece of acting, Mr. Alvarez. Who is this person?"
"My twin brother and my aid."
"And what does this all mean?"
"It is a test of identification."
"You are a wonderful man."
"I am?"
"Yes."
"How?"