In another minute the intruder came into her line of vision—a line of vision that was necessarily somewhat incomplete but which yet answered its purpose. A tall man, broad shouldered and powerful looking, with a long black beard. Bundle remembered having seen him sitting at one of the baccarat tables on the preceding night.

This, then, was Alfred's mysterious Russian gentleman, the proprietor of the club, the sinister Mr. Mosgorovsky. Bundle's heart beat faster with excitement. So little did she resemble her father that at this minute she fairly gloried in the extreme discomfort of her position.

The Russian remained for some minutes standing by the table, stroking his beard. Then he drew a watch from his pocket and glanced at the time. Nodding his head as though satisfied, he again thrust his hand into his pocket, and, pulling out something that Bundle could not see, he moved out of her line of vision.

When he reappeared again, she could hardly help giving a gasp of surprise.

His face was now covered by a mask—but hardly a mask in the conventional sense. It was not shaped to the face. It was a mere piece of material hanging in front of the features like a curtain in which two slits were pierced for the eyes. In shape it was round and on it was the representation of a clock face, with the hands pointing to six o'clock.

"The Seven Dials!" said Bundle to herself.

And at that minute there came a new sound—seven muffled taps.

Mosgorovsky strode across to where Bundle knew was the other cupboard door. She heard a sharp click, and then the sound of greetings in a foreign tongue.

Presently she had a view of the newcomers.

They also wore clock masks, but in their case the hands were in a different position—four o'clock and five o'clock respectively. Both men were in evening dress—but with a difference. One was an elegant, slender young man wearing evening clothes of exquisite cut. The grace with which he moved was foreign rather than English. The other man could be better described as wiry and lean. His clothes fitted him sufficiently well, but no more, and Bundle guessed at his nationality even before she heard his voice.