"I tell you what," he said slowly, "the diamonds were stolen between six o'clock and the time you went to bed."
"About three o'clock," said Kitty.
"Precisely. You saw the diamonds last at six; they were gone by three; you mentioned where you kept them at the supper-table; now, the thief must have overheard you."
"You--you suspect my guests, sir," cried Kitty angrily.
"Certainly not," said the detective quietly; "but I suspect Villiers."
"Villiers!"
"Yes. Mr. Fenton tells me you saw him on that night."
Kitty flashed a look of anger on the American, who bore it unmoved.
"Yes, he was outside, and wanted to see me. I saw him, gave him some money, and he left."
"Then I tell you he overheard you say where you kept the diamonds, because he was hiding outside the window; so, after seeing you, he committed the robbery."