For the first time Carter realized how terrific utter silence, mental and physical, may be. The earlier moments had never failed to contain some perceptible rhythm, if only the faint, cryptical pulse of the Earth's dimensional extension, but now the hush of the abyss seemed to fall upon everything. Despite his intimations of body, he had no audible breath, and the glow of 'Umr at-Tawil's quasi-sphere had grown petrifiedly fixed and unpulsating. A potent nimbus, brighter than those which had played round the heads of the Shapes, blazed frozenly over the shrouded skull of the terrible Guide.