invasions of viruses against which they had no defence. The breeding programmes were then adjusted as necessary.
I was sent to Rohanda by one of our fastest craft, and not by means of Zone Six. I did want to inspect Zone Six, but not until after I had studied the situation on the planet itself where I needed to be quickly, and in the flesh. It had been decided that I should be in the form of a Native and not of a Giant, because I was to stay on and help the Natives after the Giants had been taken off. This decision was correct. Others were arguable. Looking back, afterwards, I knew that I should have sacrificed other considerations to getting to my task more quickly. Yet I did need to acclimatize myself. I could not appear at once in any one of the cities, with its specialized vibrations, without suffering severe effects. The difference between Canopus and Rohanda was very great, and none of us could begin work at once on arrival: time had always to be given to the process of acclimatization. But things were worse that we had thought: and were worsening faster than expected.
The spaceship approached the extreme eastern edge of the main landmass from the northwest, coming low over fertile and forested mountains and plateaux and plains that later were great deserts â thousands of square miles of deserts. We saw several cities, and wondered how the inhabitants who chanced to look up thought of our crystalline sphere darting past, and how they would talk of it to those who hadnât seen us.
At that time I did not know which city it would be best to approach first. On the extreme eastern shore â the mainland, not one of the islands â I made my measurements. Meanwhile, the spaceshipâs crew explored, but carefully, for we did not want to startle anybody, and if we were seen, it might lead to complications, for almost certainly it would be thought that a Native had been captured by alien beings. It was not easy to assess exactly what the change was, neither its nature nor extent, but I decided that the Square City wouldbe best: we had seen it as we passed over. It was about a weekâs hard walking away, and that was about right for my accustoming myself to Rohanda. I had already said that the craft might leave again, when I understood that the air of the planet had altered. And very suddenly. More calculations. The Square City would not now be right. I changed orders, and we ascended again, travelling not over the same cities, but further south over the Great Mountains, where I knew the Shammat transmitter must be: I could already sense it. I was put down to the east of the area of the great inland seas. There I again tested â and the same thing happened: I had decided on the Oval City to the north of the most northern inland sea, when again the atmosphere changed. But by now I had sent away the spacecraft. I had weeks of walking to do, in order to reach the Round City, which was now where I had to be. But this would take too long.
The Round City was on the high plateaux to the south of the great inland seas. It was not a centre of administration or of power, for there was no such centre. But apart from the suitability of its vibratory patterns, it was geographically central, and my news would be more easily disseminated. Also the height and the sharpness of the atmosphere would preserve this city longer than others from what would shortly befall. Or so I hoped. And I hoped, too, that there would not be another shift in the alignment of the planet, which would make the Round City the wrong one for me.
First, there was the problem of time. I approached some horses grazing in a herd on a mountain side, and stood near them, looking at them intently in a silent request for their help. They were restive and uncertain, but then one approached me, and stood waiting, and I got on its back. I directed it, and we cantered off southwards. The herd came with us. Mile after mile was covered, and I was becoming