There were two others down--one killed and one wounded--and the Colosseum was a babble of voices and a bedlam of noise. Tarzan sprang quickly to aid one of his fellows, but another white, who had killed his red opponent, ran to interfere. Tarzan's net annoyed him, so he threw it at a white who was pressing one of the reds and took on his fresh opponent, who had drawn his sword. His adversary was a professional gladiator, a man trained in the use of all his weapons, and Tarzan soon realized that only through great strength and agility might he expect to hold his own with this opponent. The fellow did not rush. He came in slowly and carefully, feeling out Tarzan. He was cautious because he was an old hand at the business and was imbued with but a single hope--to live. He cared as little for the hoots and jibes of the people as he did for their applause, and he hated Caesar. He soon discovered that Tarzan was adopting defensive tactics only, but whether this was for the purpose of feeling out his opponent or whether it was part of a plan that would lead up to a sudden and swift surprise, the gladiator could not guess, nor did he care particularly, for he knew that he was master of his weapon and many a corpse had been burned that in life had thought to surprise him. Judging Tarzan's skill with the sword by his skill with the shield, the gladiator thought that he was pitted against a highly skilled adversary, and he waited patiently for Tarzan to open up his offense and reveal his style. But Tarzan had no style that could be compared with that of the gladiator. What he was awaiting was a lucky chance--the only thing that he felt could assure him victory over this wary and highly skilled swordsman--but the gladiator gave him no openings and he was hoping that one of his companions would be free to come to his assistance, when, suddenly and without warning, a net dropped over his shoulders from behind. _Chapter Sixteen_ Cassius Hasta split the helmet of a burly thief who opposed him, and as he turned to look for a new opponent he saw a white cast a net over Tarzan's head and shoulders from the rear, while the ape-man was engaged with a professional gladiator. Cassius was nearer the gladiator than Tarzan's other opponent and with a cry he hurled himself upon him. Tarzan saw what Cassius Hasta had done and wheeled to face the white who had attacked him from the rear. The gladiator found Cassius Hasta a very different opponent from Tarzan. Perhaps he was not as skilful with his shield. Perhaps he was not as powerful, but never in all his experience had the gladiator met such a swordsman.