“They do not appear to trouble to track Mademoiselle’s assailant. They say they will wait until daylight before searching for footprints on the gravel outside.”

“Ah! They are not very fond of making arrests within the Principality. It’s such a bad advertisement for the Rooms. The Administration like to show a clean sheet as regards serious crime. Our friends here leave it to the French or Italian police to deal with the criminals so that the Principality shall prove itself the most honest State in Europe,” Brock said.

“The police, I believe, suspect me of shooting her,” said Hugh bluntly.

“That’s very awkward. Why?”

“Well—they don’t know the true reason I went to see her, or they would never believe me to be guilty of a crime so much against my own interests.”

Brock, who was still sitting up in bed in his pale blue silk pyjamas, reflected a few moments.

“Well, Hugh,” he said at last, “after all it is only natural that they should believe that you had a hand in the matter. Even though she told you the truth, it is quite within reason that you should have suddenly become incensed against her for the part she must have played in your father’s mysterious death, and in a frenzy of anger you shot her.”

Hugh drew a long breath, and his eyebrows narrowed.

“By Jove! I had never regarded it in that light before!” he gasped. “But what about the weapon?”

“You might easily have hidden it before the arrival of the police. You admit that you went out on the veranda. Therefore if they do chance to find the weapon in the garden then their suspicions will, no doubt, be considerably increased. It’s a pity, old man, that you didn’t make a clean breast of the motive of your visit.”