There now followed a hideous whirl through frigid space, endlessly up and eastward toward the gaunt grey flanks of those impassable mountains beyond which Leng was said to be. Far above the clouds they flew, till at last there lay beneath them those fabled summits which the folk of Inquanok have never seen, and which lie always in high vortices of gleaming mist. Carter beheld them very plainly as they passed below, and saw upon their topmost peaks strange caves which made him think of those on Ngranek; but he did not question his captor about these things when he noticed that both the man and the horse-headed Shantak appeared oddly fearful of them, hurrying past nervously and shewing great tension until they were left far in the rear.