The professor's agitation was so great that he could not go on further. And indeed there was not one of us who did not fully share his excitement. To think that we should have come to the planet Mars to solve one of the standing mysteries of the earth, which had puzzled mankind and defied all their efforts at solution for so many centuries! Here, then, was the explanation of how those gigantic blocks that constitute the great Pyramid of Cheops had been swung to their lofty elevation. It was not the work of puny man, as many an engineer had declared that it could not be, but the work of these giants of Mars. At length, our traditions say, a great pestilence broke out in the Land of Sand, and a partial vengeance was granted to us in the destruction of the larger number of our enemies. At last the giants who remained, fleeing before this scourge of the gods, used the mysterious means at their command, and, carrying our ancestors with them, returned to their own world, in which we have ever since lived. "Then there are more of your people in Mars?" said one of the professors. "Alas, no," replied Aina, her eyes filling with tears, "I alone am left." For a few minutes she was unable to speak. Then she continued: "What fury possessed them I do not know, but not long ago an expedition departed from the planet, the purpose of which, as it was noised about over Mars, was the conquest of a distant world. After a time a few survivors of that expedition returned. The story they told caused great excitement among our masters. They had been successful in their battles with the inhabitants of the world they had invaded, but as in the days of our forefathers, in the Land of Sand, a pestilence smote them, and but few survivors escaped. "Not long after that, you, with your mysterious ships, appeared in the sky of Mars. Our masters studied you with their telescopes, and those who had returned from the unfortunate expedition declared that you were inhabitants of the world which they had invaded, come, doubtless, to take vengeance upon them. "Some of my people who were permitted to look through the telescopes of the Martians, saw you also, and recognized you as members of their own race. There were several thousand of us all together, and we were kept by the Martians to serve them as slaves, and particularly to delight their ears with music, for our people have always been especially skillful in the playing of musical instruments, and in songs, and while the Martians have but little musical skill themselves, they are exceedingly fond of these things.