There, at the fort, civilization ended. Fort Tuscelan was the last outpost of a civilized world; it represented the westernmost thrust of the dominant Hyborian races. Beyond the river the primitive still reigned in shadowy forests, brush-thatched huts where hung the grinning skulls of men, and mud-walled enclosures where fires flickered and drums rumbled, and spears were whetted in the hands of dark, silent men with tangled black hair and the eyes of serpents. Those eyes often glared through the bushes at the fort across the river. Once dark-skinned men had built their huts where that fort stood; yes, and their huts had risen where now stood the fields and log cabins of fair-haired settlers, back beyond Velitrium, that raw, turbulent frontier town on the banks of Thunder River, to the shores of that other river that bounds the Bossonian marches. Traders had come, and priests of Mitra who walked with bare feet and empty hands, and died horribly, most of them; but soldiers had followed, and men with axes in their hands and women and children in ox-drawn wains. Back to Thunder River, and still back, beyond Black River the aborigines had been pushed, with slaughter and massacre. But the dark-skinned people did not forget that once Conajohara had been theirs. The guard inside the eastern gate bawled a challenge. Through a barred aperture torchlight flickered, glinting on a steel head-piece and suspicious eyes beneath it. 'Open the gate,' snorted Conan. 'You see it's I, don't you?' Military discipline put his teeth on edge. The gate swung inward and Conan and his companion passed through. Balthus noted that the gate was flanked by a tower on each side, the summits of which rose above the stockade. He saw loopholes for arrows. The guardsmen grunted as they saw the burden borne between the men. Their pikes jangled against each other as they thrust shut the gate, chin on shoulder, and Conan asked testily: 'Have you never seen a headless body before?' The face of the soldiers were pallid in the torchlight. 'That's Tiberias,' blurted one. 'I recognize that fur-trimmed tunic. Valerius here owes me five lunas. I told him Tiberias had heard the loon call when he rode through the gate on his mule, with his glassy stare. I wagered he'd come back without his head.' Conan grunted enigmatically, motioned Balthus to ease the litter to the ground, and then strode off toward the governor's quarters, with the Aquilonian at his heels. The tousle-headed youth stared about him eagerly and curiously, noting the rows of barracks along the walls, the stables, the tiny merchants' stalls, the towering blockhouse, and the other buildings, with the open square in the middle where the soldiers drilled, and where, now, fires danced and men off duty lounged. These were now hurrying to join the morbid crowd gathered about the litter at the gate. The rangy figures of Aquilonian pikemen and forest runners mingled with the shorter, stockier forms of Bossonian archers.