Then, winter was the time for weaving. This Edith could not do, as yet. She was not quite strong enough. One had to sit in a frame that had a row of threads stretched across it, with another row running the same way but so fastened that at one end they could be either raised up above the level of the first row or dropped beneath it. Sitting at the tied end her mother would throw a little wooden boat skimming between the two sets of threads, from one side to the other, the boat being laden with a spool of yarn and dragging a thread behind it. When the boat reached the other side, the thread would be drawn tight. Then with the foot in a strap the loose bar would be drawn down, taking one set of threads with it, and there would be the boat's thread caught as in a trap. Then the boat would come flashing back on its return voyage, up would go the bar again, and that thread would be fast, too, just as the other was; and so the cloth would grow, by just the width of the boat-thread, with each trip. It was slow work, to be sure; but then, one had plenty of time. Then, too, it was such pretty work! One could have several little boats, each laden with a differently coloured thread. By using two at a time, going opposite ways, the cloth would have a "pepper-and-salt" mixture of colour, as we call it now; or by using one for a time and then the other, it would make broad stripes of colour, which was thought very fine. Yet, after all, Edith Fairhair thought nothing could be prettier than pure white--if only it was kept white. But, white or coloured, she never tired watching the flying shuttles, as we call the little boats to-day. Meanwhile, all through the winter, merrily rang the smithy with clink of hammer on heated steel. After that gift to Edith the Jarl told Ulf he might take all the time he needed for his freedom-work; and he took it. Pounds of steel needles had been made and stored away. He had tried to remember all he ever heard about how to temper them, and he already had learned to watch the glowing steel slowly change its colour from dazzling white as it cooled to rose red, and at just the right moment to plunge it into water. But he only tried it on one or two bits, as yet, just to make sure he was right; and these utterly astonished him by their hardness. No iron that he had ever seen was like it. Of course he laid it all to the magic of the Star, as many a warrior did in after years, not knowing that in that kind of iron there is often a small mixture of nickel, such as our five-cent piece is made of, and that steel made from such a mixture is harder and tougher than any other kind. Bicycle-makers have found this out for themselves, and know the reason of the toughness, but it was a great mystery to Ulf.