THE FORTRESS UNVANQUISHABLE
louder than a whistle and then could be heard no more. Once or twice Leothric saw a star blink for an instant and reappear again, and this momentary eclipse of a few stars was all that remained in the world of the body of Thok. And Lunk, the brother of Thok, who had lain a little behind him, saw that this must be Sacnoth and fled lumbering away. And all the while that he walked between the abysses, the mighty vault of the roof of the fortress still stretched over Leothric's head, all filled with gloom. Now, when the farther side of the abyss came into view, Leothric saw a chamber that opened with innumerable arches upon the twin abysses, and the pillars of the arches went away into the distance and vanished in the gloom to left and right.
Far down the dim precipice on which the pillars stood he could see windows small and closely barred, and between the bars there
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