At that same instant, with a crash that shivered the air, the immense metallic power house gave way and was swept tumbling, like a hill torn loose from its base, over the very spot where a moment before we had stood. One second's hesitation on the part of Tom, and the electrical ship would have been battered into a shapeless wad of metal by the careening mass.

When we had attained a considerable height, so that we could see a great distance on either side, the spectacle became even more fearful than it was when we were close to the surface.

On all sides banks and dykes were going down; trees were being uprooted; buildings were tumbling, and the ocean was achieving that victory over the land which had long been its due, but which the ingenuity of the inhabitants of Mars had postponed for ages.

Far away we could see the front of the advancing wave crested with foam that sparkled in the electric lights, and as it swept on it changed the entire aspect of the planet—in front of it all life, behind it all death.

Eastward our view extended across the Syrtis Major toward the land of Libya and the region of Isidis. On that side also the dykes were giving way under the tremendous pressure, and the floods were rushing toward the sunrise, which had just began to streak the eastern sky.

The continents that were being overwhelmed on the western side of the Syrtis were Meroc, Aeria, Arabia, Edom and Eden.

The water beneath us continually deepened. The current from the melting snows around the southern pole was at its strongest, and one could hardly have believed that any obstruction put in its path would have been able to arrest it and turn it into these two all-swallowing deluges, sweeping east and west. But, as we now perceived, the level of the land over a large part of its surface was hundreds of feet below the ocean, so that the latter, when once the barriers were broken, rushed into depressions that yawned to receive it.

The point where we had dealt our blow was far removed from the great capitol of Mars, around the Lake of the Sun, and we knew that we should have to wait for the floods to reach that point before the desired effect could be produced. By the nearest way, the water had at least 5,000 miles to travel. We estimated that its speed where we hung above it was as much as a hundred miles an hour. Even if that speed were maintained, more than two days and nights would be required for the floods to reach the Lake of the Sun.

But as the water rushed on it would break the banks of all the canals intersecting the country, and these, being also elevated above the surface, would add the impetus of their escaping waters to hasten the advance of the flood. We calculated, therefore, that about two days would suffice to place the planet at our mercy.

Half way from the Syrtis Major to the Lake of the Sun another great connecting link between the Southern and Northern ocean basins, called on our maps of Mars the Indus, existed, and through this channel we knew that another great current must be setting from the south toward the north. The flood that we had started would reach and break the banks of the Indus within one day.