robbery. In this way he will quiet the lady, who might conceivably tell all to her husband, an affair which would not suit our blackmailer at all, he will have £50,000 insurance money (aha, you had forgotten that!), and he will still have the diamond! At this point I put my finger in the pie. The arrival of a diamond expert is announced. Lady Yardly, as I felt sure she would, immediately arranges a robbery—and does it very well too! But Hercule Poirot, he sees nothing but facts. What happens in actuality? The lady switches off the light, bangs the door, throws the necklace down the passage, and screams. She has already wrenched out the diamond with pliers upstairs———"
"But we saw the necklace round her neck!" I objected.
"I demand pardon, my friend. Her hand concealed the part of it where the gap would have shown. To place a piece of silk in the door beforehand is child's play! Of course, as soon as Rolf read of the robbery, he arranged his own little comedy. And very well he played it!"
"What did you say to him?" I asked with lively curiosity.
"I said to him that Lady Yardly had told her
