A moment later an officer resplendent in the gorgeous trappings of his rank appeared on deck and welcomed Xodar to the vessel, and in the latter's wake we filed aboard and below.

The cabin in which we found ourselves extended entirely across the ship, having port-holes on either side below the water line. No sooner were all below than a number of commands were given, in accordance with which the hatch was closed and secured, and the vessel commenced to vibrate to the rhythmic purr of its machinery.

"Where can we be going in such a tiny pool of water?" asked Phaidor.

"Not up," I replied, "for I noticed particularly that while the building is roofless it is covered with a strong metal grating."

"Then where?" she asked again.

"From the appearance of the craft I judge we are going down," I replied.

Phaidor shuddered. For such long ages have the waters of Barsoom's seas been a thing of tradition only that even this daughter of the therns, born as she had been within sight of Mars' only remaining sea, had the same terror of deep water as is a common attribute of all Martians.

Presently the sensation of sinking became very apparent. We were going down swiftly. Now we could hear the water rushing past the port-holes, and in the dim light that filtered through them to the water beyond the swirling eddies were plainly visible.

Phaidor grasped my arm.

"Save me!" she whispered. "Save me and your every wish shall be granted. Anything within the power of the Holy Therns to give will be yours. Phaidor—" she stumbled a little here, and then in a very low voice, "Phaidor already is yours."