Glancing over his shoulder, Don saw the big Chinese standing behind him against a blank wall. There was no sign of the opening through which the three of them had just passed.

“Neat, very neat indeed, Cho-San!” murmured the pseudo count. “But, tell me, which way do we go from here to the comrades’ quarters? My recollection is still a bit vague, although this room does seem familiar....”

“The cabinet!” broke in the Scorpion leader shortly. “That way is the quickest. And I am tired of hearing about your infernal memory, Borg! Open the cabinet, Lotus!”

Obediently the girl crossed to a huge cabinet of ebony wood, and twisted one of its curiously carved dragons’ heads. With scarcely a sound the door swung wide, leaving an opening the size of a full grown man. How far back the space extended Don could not see from where he stood.

“Step in, Lotus, and show your André the way!” sneered Cho-San. “You act, Count Borg, as if it were a trap. Don’t worry, I am following you both inside!”

The Chinese suited his action to the word, closing the cabinet door after him. Again Don caught the smooth, scarcely audible hum of oiled machinery somewhere near by.

“More darkness!” he sighed after a number of seconds had ticked by in silence. “Really, Cho-San, a nice bright electric bulb here would cheer things up! By the way, I thought we were going somewhere in a hurry. This jolly old cabinet....”

“Silence, fool!” gritted the Oriental. “You are no longer in the cabinet you entered a moment ago. That ancient work of art is now standing as you saw it, far above us. Only its floor is missing, for that is now beneath our feet!”

“And here we are almost at the entrance to the comrades’ quarters!” cried Lotus, as the elevator floor quivered briefly. “Now I shall press another invisible button, and you shall see that I am right, André. There will be plenty of light where we are going.”

Once more a panel slid aside to show a narrow, dimly lighted corridor. This one seemed to be dug out of bedrock, with rough corners projecting. Slipping into it, the girl disappeared around a jagged corner.