“Of course we aren’t gifted, sir. But we’re professional. Something in that, don’t you think? Yes, sir, as you say: we have noticed something. It was a foreign car, and foreign tyres did the trick last night. And the Archduchess drives English. And yet—did you know we had the other half of the hatpin? I picked it up last night.” He held out a scrap of steel with a big head of wrought silver. “German work, they tell me.”

“Viennese,” Reggie said.

“You know everything, sir. Such a convenience. But Vienna being quite near Bohemia, as I’ve heard—looks awkward, don’t it?”

“Is that what you came to say?”

“Not wholly, sir. No. I am Superintendent Bell. Mr. Lomas sent me to you. He considered you might find it convenient to have some one in the house who could keep an eye open.”

“Very kind of Mr. Lomas.”

There was a tap at the door. The Archduke Leopold’s valet appeared. The Archduke Leopold was much surprised that Dr. Fortune had not brought him news of the patient. The Archduke Leopold desired that Dr. Fortune would come to him immediately.

“Really?” Reggie said. “Dr. Fortune’s compliments to the Archduke, and he is much occupied. He can give the Archduke a few moments.”

The valet, having the appearance of a man who has never been so surprised in his life, retired.

“It’s a gift,” Superintendent Bell murmured. “It’s a gift, you know. I never could handle the nobs.”