remarkable captive after he had recovered from his wounds.

The long corridor, through which they were proceeding, was lighted partially by small candles set in niches and by the light from illuminated chambers the doors of which opened upon it. Slaves and warriors moved in two continuous and opposing lines through this corridor and every one that crossed it. There were high caste slaves in white tunics with the red emblems of their owners and their own occupation insignia upon them; there were green-tunicked slaves of the second gen­eration with their master’s insignia upon breast and back in black, and green-tunicked slaves of the first generation with a black emblem upon their breasts denoting the city of their nativity and their master’s emblem upon their backs; there were warriors of every rank and position; there were the plain leather trappings of the young and poor, and the jewel studded harness of the rich; and passing all these in both directions and often at high speed were other warriors mounted upon the mighty antelopes that were still the greatest wonder that had confronted Tarzan since his in­carceration in the city of Veltopismakus.

At intervals along the corridor Tarzan saw lad­ders extending to a floor above, but as he never saw one descending to a lower level he assumed that they were then upon the lowest floor of the structure. From the construction that he noted