Her duties alternated between military or police scouting and factory work. For the two-week period which would end the next day, she had been on "air patrol." This did not mean, as I first imagined, that she was flying, but rather that she was on the lookout for Han ships over this outlying section of the Wyoming territory, and had spent most of her time perched in the tree tops scanning the skies. Had she seen one she would have fired a "drop flare" several miles off to one side, which would ignite when it was floating vertically toward the earth, so that the direction or point from which it had been fired might not be guessed by the airship and bring a blasting play of the disintegrator ray in her vicinity. Other members of the air patrol would send up rockets on seeing hers, until finally a scout equipped with an ultrophone, which, unlike the ancient radio, operated on the ultronic ethereal vibrations, would pass the warning simultaneously to the headquarters of the Wyoming Gang and other communities within a radius of several hundred miles, not to mention the few American rocket ships that might be in the air, and which instantly would duck to cover either through forest clearings or by flattening down to earth in green fields where their coloring would probably protect them from observation. The favorite American method of propulsion was known as "_rocketing_." The _rocket_ is what I would describe, from my 20th Century comprehension of the matter, as an extremely powerful gas blast, atomically produced through the stimulation of chemical action. Scientists of today regard it as a childishly simple reaction, but by that very virtue, most economical and efficient. But tomorrow, she explained, she would go back to work in the cloth plant, where she would take charge of one of the synthetic processes by which those wonderful substitutes for woven fabrics of wool, cotton and silk are produced. At the end of another two weeks, she would be back on military duty again, perhaps at the same work, or maybe as a "contact guard," on duty where the territory of the Wyomings merged with that of the Delawares, or the "Susquannas" (Susquehannas) or one of the half dozen other "gangs" in that section of the country which I knew as Pennsylvania and New York States. Wilma cleared up for me the mystery of those flying leaps which she and her assailants had made, and explained in the following manner, how the inertron belt balances weight: "_Jumpers_" were in common use at the time I "awoke," though they were costly, for at that time _inertron_ had not been produced in very great quantity. They were very useful in the forest. They were belts, strapped high under the arms, containing an amount of inertron adjusted to the wearer's weight and purposes. In effect they made a man weigh as little as he desired; two pounds if he liked.