Nelson frantically worked the ejector lever but only an empty click resulted! His heart sank. "Hell! the magazine's empty!" * * * * * He had just time to swing the Winchester about and grasp its barrel as the Jarmuthian, with a loud shout, sprang in, slashing viciously at Nelson's unprotected neck. Using the clubbed rifle like a baseball bat, the American struck out with the strength of despair. There came a resonant clang as blade and barrel encountered each other. Steel is ever stronger than bronze, so Nelson had the satisfaction of seeing the Jarmuthian's sword blade break squarely in two near the hilt. Horrified, the black bearded warrior glanced at the empty hilt in his hand but, courageous to the end, sprang in like a tiger to grapple with that small, agile man in khaki and serge. "You would--eh?" gasped Nelson. Putting all his strength behind a blow he whirled up the heavy Winchester, struck out and felt the solid walnut stock smash fair and square on the conical helmet. Like an eggshell the bronze helm broke and the six-pointed star above went spinning off into the dust. As a tree sways before it falls beneath a forester's ax, so the dark Jarmuthian giant tottered, while the wide dusty plain of Poseidon echoed with a rumbling, incredulous shout. "There," choked Nelson, incredulous to be still alive, "I guess that'll be about all for to-day." But he was wrong. From the ranks of Jarmuth rose a terrible, ominous cry and at the same time there broke out the sibilant hiss of a thousand retortii. From the Atlantean army came an answering yell and Nelson turned to race back to the shelter of Altorius' body-guard, pausing but to arouse the terrified hostages. Swiftly he cast loose their bonds and pointed to the nearest detachment of Atlanteans. Sobbing with joy the six girls fled for dear life just as the first of the allosauri went racing over the plains. Screaming, all-powerful and uncanny war dogs, they bounded grotesquely high in the air, plunging straight towards the Jarmuthian ranks which greeted them with a searing, billowing blast of their retortii. Though dozens of the terrible creatures fell kicking and writhing beneath the scalding discharge of the retortii, the main body, perhaps forty or fifty in number, sprang like rending fiends into the dense packed masses of Jarmuthian infantry. * * * * * Of the ensuing battle, Nelson had but the most confused recollections. The dominating impression was that the fray was awesome, horrible beyond power of description. He recalled feeding the five remaining cartridges into the magazine, then clapping on an Atlantean noble's helmet. With Hero John at his side he joined in an furious headlong charge of the podoko corps.