“Have you met his lordship recently? He doesn’t appear to have noticed you.”

“I saw both the Earl and the Countess this afternoon,” I said. “I called at Eaton Square.”

Almost before the words had left my lips, Fyneshade and his friends entered the bar, the trio speaking loudly in jovial tones, and in a moment he recognised me. Markwick and I exchanged glances, but neither of us acknowledged the other. It was strange, to say the least, that he of all men should be spending the evening with Mabel’s husband.

“Hulloa, Ridgeway!” cried the Earl, coming forward. “Didn’t expect to see you here. Where did you dine?”

“At the club,” I answered, and turning, introduced Grindlay as Captain Hayden.

“Good show here, isn’t it,” Fyneshade exclaimed enthusiastically to the detective. “Juniori is excellent to-night. Her last song, ‘Trois Rue du Pan,’ is immense. It’s the best thing she has ever sung, don’t you think so?” Grindlay agreed, criticised the vivacious dark-eyed chanteuse with the air of a blasé man-about-town, and chatted with his new acquaintance with well-bred ease and confidence. In a few minutes, however, Fyneshade returned to rejoin his friends at the other end of the small bar, while Grindlay and myself strolled out again on our watchful vigil.

At last, after a diligent search, my friend suddenly gripped my arm, whispering—

“See that man with the rose in his coat. You would hardly suspect him of a diamond robbery, would you?”

“No, by Jove!” I said. “I never should.” As we passed I looked toward him and saw he was aged about fifty, with hair slightly tinged with grey; he wore evening clothes, with a fine pearl and emerald solitaire in his shirt, and upon his hands were lavender gloves. In earnest conversation with him was a short, stout, elderly man, with grey scraggy beard and moustache, about whose personality there was something striking, yet indefinable.

“Oh!” exclaimed Grindlay, when we were out of hearing. “I had not suspected this!”