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 rather proficient by this time. The Sagoths couldn't stand much of this sort of warfare, so they charged us, yelling like fiends. We let them come quite close, and then the musketeers who formed the first line opened up on them.

The slaughter was something frightful, but still the remnants of them kept on coming until it was a matter of hand-to-hand fighting. Here our spearmen were of value, as were also the crude iron swords with which most of the imperial warriors were armed.

We lost heavily in the encounter after the Sagoths reached us; but they were absolutely exterminated—not one remained even as a prisoner. The Mahars, seeing how the battle was going, had hastened to the safety of their buried city. When we had overcome their gorilla-men we followed after them.

But here we were doomed to defeat, at least temporarily; for no sooner had the first of our troops descended into the subterranean avenues than many of them came stumbling and fighting their way back to the surface, half-choked by the fumes of some deadly gas that the reptiles had liberated upon them. We lost a number of men here. Then I sent for Perry, who had remained discreetly in the rear, and had him construct a little affair that I had had in my mind against the possibility of our meeting with a check at the entrances to the underground city.

Under my direction he stuffed one of his cannon full of powder, small bullets, and pieces of stone, almost to the muzzle. Then he plugged the muzzle tight with a cone-shaped block of wood, hammered and jammed in as tight as it could be. Next he inserted a long fuse. A dozen men rolled the cannon to the top of the stairs leading down into the city, first removing it from its carriage. One of them then lit the fuse and the whole thing was given a shove down the stairway, while the detachment turned and scampered to a safe distance.

For what seemed a very long time nothing happened. We had commenced to think that the fuse had been put out while the piece was rolling down the stairway, or that the Mahars had guessed its purpose and extinguished it themselves, when