I glanced at the doorway, and my heart sank within me when I noticed that the unwhitened stones were littered with drifting straws and scraps of paper, the flotsam and jetsam of the street, that the glass of the wide fanlight was thickly encrusted with dirt, and that the board fixed over the door, announcing that the “imposing mansion” was to let, had, judging from its begrimed, blistered, and weather-stained appearance, been in that position several years.

To reassure myself, I glanced at my cuff and inquired of the cabman whether the house was not Number 79 Gloucester Square.

“Quite right, sir,” answered the plethoric driver. “This ’ere’s Radnor Place, but these ’ouses fronts into the square. This row ’ain’t got no entrances there, but the front doors are at the back here. I’ve known these ’ouses ever since I was a nipper. This ’ere one’s been to let this last four years. A French gentleman lived ’ere before.”

“I fancy you’ve mistaken the number,” drawled the Countess’s companion, putting up his single eye-glass to survey the place more minutely. “So confoundedly easy to make mistakes, don’t yer know,” and he laughed, as if amused at his witticism.

I resented this apparent hilarity, and with difficulty restrained some hot words that rose quickly to my lips. It had occurred to me that if I preserved silence and gave no sign, I might perhaps discover the identity of this foppish young man. The mansion, silent, dismal, and deserted, was drab-painted and of unusually imposing proportions. The drawing-room on the first floor was evidently of vast extent, running the whole width of the house and commanding in front a wide view across the square, while at the rear it opened upon a fine domed conservatory constructed over the great portico.

“If you can’t find your friends, Stuart, I’ll give you a lift homeward. My carriage is at the corner,” Mabel said, evidently anxious to get away. “I’m going down to the Reform, to fetch Fyneshade.”

In this invitation I saw an opportunity of obtaining some further knowledge of her mysterious companion, and, after settling with my cabman, lost no time in embracing it. A few moments later the Countess’s smart victoria drew up, and entering, I took the place beside her, while Sternroyd seated himself opposite.

As we drove around Southwick Crescent in the direction of Park Lane, Mabel, in the course of conversation, let drop the fact that Gilbert, a protégé of her husband’s, was spending a few days at Eaton Square prior to returning to his studies at Oxford.

“Yes,” he drawled. “A fellow appreciates town after poring over musty volumes, as I unfortunately am compelled to do. Beastly bore!”

Then he told me he was at Balliol—my old college—and our conversation afterwards turned mainly upon dons and duns.