The men seemed surprised.

"We're a little before our time, my lady," said Combes, "but——"

Haslemere snatched the words from his mouth. "But you telegraphed. You came here——"

"We didn't telegraph, my lord," the detective respectfully contradicted him.

Violet gave a cry, and put her hands up to her head, staring at the trio so subtly altered. As before, I was a back-ground figure. I said nothing, but I thought a good deal. The trick jokingly suggested by me had actually been played.

At first neither Violet nor Haslemere would believe the dreadful thing. It was too bad to be true. These, not the other three, were the impostors! Violet staggered towards the bell to call the servants, but Combes showed his police badge: and between the trio it was soon made clear that the Marquis and Marchioness of Haslemere had let themselves be utterly bamboozled. They had of their own free will handed over to a pack of thieves nearly one hundred thousand pounds worth of famous jewels: not even their own, but other people's jewels entrusted to them for charity!

There was, however, not a moment to waste in repinings. The local police were warned by telephone; the escaping car and chauffeur were described, and the genuine detectives, with the jewel-expert, dashed off in pursuit of their fraudulent understudies. Meantime, while the others talked, I reflected; and an astonishing idea began to crystallise in my brain. When Violet was left crying on Haslemere's shoulder (sobbing that she was ruined, that she would kill herself rather than face the blame of her friends) I made my voice heard.

"I know you and Haslemere always hated my detective talents—if any. But they might come in useful now, if I could get an inspiration," I remarked.

Violet caught me up.

"Have you an inspiration?"