A quarter of a mile farther along the tunnel opened into another, yet greater cave, and there every man kicked off his slippers, without seeming to trouble how they lay; they littered the floor unarranged and uncared for, looking like the cast-off wing-cases of gigantic beetles. After that cave there were two sharp turns in the tunnel, and then at last a sea of noise and a veritable blaze of light. Part of the noise made King feel homesick, for out of the mountain's very womb brayed a music-box, such as the old-time carousels made use of before the days of electricity and steam. It was being worked by inexpert hands, for the time was something jerky; but it was robbed of its tinny meanness and even lent majesty by the hugeness of a cavern's roof, as well as by the crashing, swinging march it played--wild--wonderful--invented for lawless hours and a kingless people. “Marchons!--Citoyens!--” The procession began to tramp in time to it, and the rock shook. They deployed to left and right into a space so vast that the eye at first refused to try to measure it. It was the hollow core of a mountain, filled by the sea-sound of a human crowd and hung with huge stalactites that danced and shifted and flung back a thousand colors at the flickering light below. There was an undertone to the clangor of the music-box and the human hum, for across the cavern's farther end for a space of two hundred yards the great river rushed, penned here into a deep trough of less than a tenth its normal width--plunging out of a great fanged gap and hurrying out of view down another one, licking smooth banks on its way with a hungry sucking sound. Its depth where it crossed the cavern's end could only be guessed by remembering the half-mile breadth of the waterfall. There were little lamps everywhere, perched on ledges amid the stalactites, and they suffused the whole cavern in golden glow, made the crowd's faces look golden and cast golden shimmers on the cold, black river bed. There was scarcely any smoke, for the wind that went like a storm down the tunnel seemed to have its birth here; the air was fresh and cool and never still. No doubt fresh air was pouring in continually through some shaft in the rock, but the shaft was invisible. In the midst of the cavern a great arena had been left bare, and thousands of turbaned men squatted round it in rings. At the end where the river formed a tangent to them the rings were flattened, and at that point they were cut into by the ramp of a bridge, and by a lane left to connect the bridge with the arena. The bridge was almost the most wonderful of all.