Thuvan Dihn and I traversed the remaining nineteen caverns without adventure or mishap.
We were afterward to learn that but once a month is it possible to find all the apts of the Carrion Caves in a single chamber.
At other times they roam singly or in pairs in and out of the caves, so that it would have been practically impossible for two men to have passed through the entire twenty-seven chambers without encountering an apt in nearly every one of them. Once a month they sleep for a full day, and it was our good fortune to stumble by accident upon one of these occasions.
Beyond the last cave we emerged into a desolate country of snow and ice, but found a well-marked trail leading north. The way was boulder-strewn, as had been that south of the barrier, so that we could see but a short distance ahead of us at any time.
After a couple of hours we passed round a huge boulder to come to a steep declivity leading down into a valley.
Directly before us we saw a half dozen men—fierce, black-bearded fellows, with skins the color of a ripe lemon.
“The yellow men of Barsoom!” ejaculated Thuvan Dihn, as though even now that he saw them he found it scarce possible to believe that the very race we expected to find hidden in this remote and inaccessible land did really exist.
We withdrew behind an adjacent boulder to watch the actions of the little party, which stood huddled at the foot of another huge rock, their backs toward us.
One of them was peering round the edge of the granite mass as though watching one who approached from the opposite side.
Presently the object of his scrutiny came within the range of my vision and I saw that it was another yellow man. All were clothed in magnificent furs—the six in the black and yellow striped hide of the orluk, while he who approached alone was resplendent in the pure white skin of an apt.