I like to see folks angry when I am dealing with them, whether they are on my side or the other.

It is when people are angry that you learn the truth from them.

I keep cool; that is my trade! Do you know, you have told me more about those lamps in the past two minutes than when you filled me up with details of how to identify them." Mr.Corbeck grunted; he was not pleased at having given himself away.
All at once he turned to me and said in his natural way: "Now tell me how you got them back ?" I was so surprised that I said without thinking: "We didn't get them back!" The traveller laughed openly.
"What on earth do you mean ?" he asked.

"You didn't get them back! Why, there they are before your eyes! We found you looking at them when we came in." By this time I had recovered my surprise and had my wits about me.
"Why, that's just it," I said.

"We had only come across them, by accident, that very moment!" Mr.Corbeck drew back and looked hard at Miss Trelawny and myself; turning his eyes from one to the other as he asked: "Do you mean to tell me that no one brought them here; that you found them in that drawer?
That, so to speak, no one at all brought them back ?" "I suppose someone must have brought them here; they couldn't have come of their own accord.