There was almost no wind, for which I was thankful, as it made our maneuvers in the air considerably less difficult. When we reached the Narrow Sea our patrols reported that Tao's ships were still in the river, waiting for others from the Lone City to join them. We hastened on, for I wished to meet them as near the Twilight shore as possible. We believed, from the reports our girls had brought us, that the enemy would have some twenty or thirty boats, most of them similar to that in which Mercer and Anina weathered the storm on the way to the Water City. We assumed that the men in the boats would be armed with the hand light-ray cylinders. These projected a beam not over four inches broad and had an effective range of about five hundred feet. The boats probably would carry large projectors also. They might be set up in the boats ready for use, or they might not. What range they would have we could not estimate, though we hoped we should encounter nothing more powerful than this one Miela and I had on the platform. Its beam was about twenty inches wide, its effective radius something like a thousand feet. We did not expect to encounter the very large projectors. We had some in the Great City with a range of something like ten miles, and others of lesser range that spread the ray out fan shape. But these were extremely heavy, and we were confident it would not be practical to mount them in the boats. We sighted the enemy in the Narrow Sea just before the Twilight shore was reached. The first intimation we had was the sight of one of the narrow beams of red-green light flashing about in the twilight. As we crept closer, at an altitude of some two thousand feet, we saw the dim outlines of the boats in the water below. There were, I made out, some ten or fifteen in sight. They were heading out into the sea in single file. Miela and I had carefully discussed the tactics we were to employ. Mercer understood our plans, and we had three or four girls detailed to fly close to the platforms and carry our orders about to the leaders of the various little squads. We sighted the boats when we were about a mile away, and, as I have said, at an altitude of some two thousand feet. They must have seen us soon afterward, for many light-rays now began flashing up from them. So far as I could determine, each boat seemed armed only with one mounted projector; these I believed to be of somewhat similar power to our own. Our first move was to poise directly over the enemy, rising to an altitude of twenty-five hundred feet. The boats kept straight on their way, and we followed them, circling overhead in lengthening spirals, but keeping well out of range.