It was natural enough too, that she should feel an unusual interest in me. In the first place, I was her personal discovery. In the second, she was a girl of studious and reflective turn of mind. She never got tired of my stories and descriptions of the 20th Century. The others of the community, however, seemed to find our friendship a bit amusing. It seemed that Wilma had a reputation for being cold toward the opposite sex, and so others, not being able to appreciate some of her fine qualities as I did, misinterpreted her attitude, much to their own delight. Wilma and I, however, ignored this as much as we could. CHAPTER IV A Han Air Raid There was a girl in Wilma's camp named Gerdi Mann, with whom Bill Hearn was desperately in love, and the four of us used to go around a lot together. Gerdi was a distinct type. Whereas Wilma had the usual dark brown hair and hazel eyes that marked nearly every member of the community, Gerdi had red hair, blue eyes and very fair skin. She has been dead many years now, but I remember her vividly because she was a throwback in physical appearance to a certain 20th Century type which I have found very rare among modern Americans; also because the four of us were engaged one day in a discussion of this very point, when I obtained my first experience of a Han air raid. We were sitting high on the side of a hill overlooking the valley that teemed with human activity, invisible beneath its blanket of foliage. The other three, who knew of the Irish but vaguely and indefinitely, as a race on the other side of the globe, which, like ourselves, had succeeded in maintaining a precarious and fugitive existence in rebellion against the Mongolian domination of the earth, were listening with interest to my theory that Gerdi's ancestors of several hundred years ago must have been Irish. I explained that Gerdi was an Irish type, evidently a throwback, and that her surname might well have been McMann, or McMahan, and still more anciently "mac Mathghamhain." They were interested too in my surmise that "Gerdi" was the same name as that which had been "Gerty" or "Gertrude" in the 20th Century. In the middle of our discussion, we were startled by an alarm rocket that burst high in the air, far to the north, spreading a pall of red smoke that drifted like a cloud. It was followed by others at scattered points in the northern sky. "A Han raid!" Bill exclaimed in amazement. "The first in seven years!" "Maybe it's just one of their ships off its course," I ventured. "No," said Wilma in some agitation. "That would be green rockets. Red means only one thing, Tony. They're sweeping the countryside with their dis beams. Can you see anything, Bill?" "We had better get under cover," Gerdi said nervously. "The four of us are bunched here in the open. For all we know they may be twelve miles up, out of sight, yet looking at us with a projecto'."