Vertorix and Tamera! They had taken the other branch of the corridor at the fork and had evidently followed the windows of the tunnel to emerge as I had done, except that I had taken the left turn and passed clear under the river. And now I saw that they were in a trap. On that side the cliffs rose half a hundred feet higher than on my side of the river, and so sheer a spider could scarce have scaled them. There were only two ways of escape from the ledge: back through the fiend-haunted tunnels, or straight down to the river which raved far beneath.