him out there, but now the cruisers of our fleet were almost complete, and all my time was taken up by the business of training the pilots who were to operate them. Luckily their controls were simple, differing but little in practise from those of our ordinary interplanetary space-ships, so that short as was the time at our disposal it proved enough for the training of the selected men. And so at last there came the twentieth day after our return, and on that night the great fleet made the start of its momentous voyage.

We had planned for the cruisers from each planet to proceed in separate groups out past Neptune, where all would rendezvous and take up their flight for Alto. And so that night the Earth contingent of ships made its start, from a great plain beyond the Hall of Planets. Crowds from over all Earth had assembled there to watch our departure—vast, silent crowds who watched our ships with the knowledge written plain on their faces that we held in our hands their only hope of life. And high above them gleamed the little spot of blood-red light that was Alto, the sun that was our goal.

Standing with Hal Kur and my pilot in the conning-tower of my flagship, I watched the ground sinking away beneath us as we rose smoothly up from Earth, with ever-increasing speed. As the gray old planet drew away beneath us my heart twisted with the thought that Sarto Sen was left behind, this time. And then our accompanying ships had slanted up beneath us and we were arrowing out through the solar system to the rendezvous beyond Neptune. When we had reached the appointed spot we paused, our cruisers hovering just beyond the icy world. A few minutes we waited and then a cloud of dark spots appeared behind us, sweeping smoothly up and resolving into a formation of cruisers which fell into place behind us. It was the fleet from Mars, and it was followed in quick succession by the contingents from Uranus and Venus. Out from arctic Neptune, behind us, there came now that world's ships, taking their place with us just ahead of the group from ringed Saturn. Then, last and at the same time, came the final two contingents, one a small one of few cruisers from Mercury, the other the mighty fleet from Jupiter. More than a thousand cruisers in all we hovered there, the massed forces of the Eight Worlds.

I gave a telestereo order which flashed through all the fleet, and the huge armada at once arranged itself in the form of a great triangle, a thousand miles wide at its base, with my own cruiser at the triangle's apex. Another order, and the whole vast fleet moved smoothly forward at uniform speed, a speed that mounted quickly 

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