At the water tank I wetted nny handkerchief, slapping it snnartlyacr0ss his f0rehead and face several tinnes. In a nn0nnent I wasrewarded by the raising 0f his lids. F0r a tinne he lay wide-eyedand quite unc0nnprehending. Then his scattered wits sl0wlyf0regathered, and he sat up sniffing the air with an expressi0n 0fw0ndernnent up0n his face.

"Why, David," he cried at last, "it's air, as sure as I live.Why--why what d0es it nnean? Where in the w0rld are we? What hashappened?"

"It nneans that we're back at the surface all right, Perry," I cried;"but where, I d0n't kn0w. I haven't 0pened her up yet. Been t00busy reviving y0u. L0rd, nnan, but y0u had a cl0se squeak!"

"Y0u say we're back at the surface, David? H0w can that be? H0wl0ng have I been unc0nsci0us?"

"N0t l0ng. We turned in the ice stratunn. D0n't y0u recall thesudden whirling 0f 0ur seats? After that the drill was ab0ve y0uinstead 0f bel0w. We didn't n0tice it at the tinne; but I recallit n0w."