"We can't leave this place," said Crouch. "Stork may turn up at any minute; it must be nearly eight o'clock already. I'll ring up the Yard, at once."

He went straight to the telephone, where almost immediately he got into communication with the famous headquarters of the London Police. He was informed that a superintendent-detective would be sent at once to Number 758, Edgware Road.

Crouch placed the receiver back upon its rest, and pulled out his watch.

"It's past eight o'clock," said he. "Russell should be here."

It was at that very moment that they heard the sound of footsteps upon the stone staircase without. Crouch hurried to the door and threw it open; and there entered three men, two of whom were young, whilst the other was considerably over sixty.

Both Crouch and Jimmy scanned the face of each man as he entered, and both, with their hands in their pockets, grasped the handles of their revolvers. In spite of the intense excitement of the moment, Jimmy Burke was conscious of a feeling of bitter disappointment, when he saw that not one of these three men was Rudolf Stork.

Each of the two younger men was well over six feet in height, broad of shoulder and deep of chest. They were dressed precisely the same, and wore blue suits, light-coloured overcoats, brown boots and wide-brimmed, black felt hats. As for the older man, he had the appearance of a professor, or some sage of ancient times; there was something about him that might almost be described as druidical. His hair was quite white, very long and somewhat greasy. He had a white beard that reached almost to his waist. His nose was long and aquiline, and his eyes much magnified by a pair of gold-rimmed spectacles. In his hand he carried an ash-plant, so knotted and heavy at the head that it resembled a club. It was he who was the first to speak, staring at Crouch over the top of his spectacles.

"Pardon me," he observed, in a voice that was exceedingly soft; "pardon me, but I have not the pleasure."

"Nor I," said Captain Crouch.

"I think you must have made a mistake," the old man went on. "My name is Russell--Theophilus Russell--and this flat belongs to me."