Nor was this magnetographic training useful merely for the purpose of pilotage through the heavenly vault. It enabled any courier to seek the region where he would most easily recharge the little engines which he bore with him under his arms to aid in his wing journey. Although he could prevent the complete exhaustion of these power auxiliaries by supplying them with some of the magnetism in his own body, it was only in emergencies that he did this; for his own system needed electric recuperation as well. Whenever this was required, he made for some region of the air that he knew to be highly electric; and there he floated, whilst with his receptive sense he drew in new stores for his own system and for his little armpit engines. Then he went on his way rejoicing, exhilarated by his new energy. One of the purposes of their frequent flight into atmospheric spheres other than their own was to drink in new magnetism from one of the great sky fountains. When a Limanoran returned from an aërial flight there was renewed life in him. His eyes glowed with a heightened radiancy; I could see a soft light play about them in the dark, and this, if needed, he could make even piercing in its brilliancy. He required no light to guide him in the deepest night. His electric sense gathered in from the atmosphere the scattered radiance that was hidden from my sight; and from his eyes he could emit this electricity in the form of light. For me, who, under all their training, was never able to develop such power over the unseen forces of the air, the eyes of Thyriel were a guide in our flight through the night sky; and by day so gentle a brilliance played around them it was little wonder they fascinated and drew me ever to them. After experiencing their power, I was not surprised at the hypnotic influence Limanoran eyes had had over the leaders of the hostile expedition. It did not astonish me to find that by means of their electric energy they could move vast masses which no mere muscular force could have touched. I had a constitution that seemed to be physically far stronger than Thyriel’s; yet, if she had time to reinforce her store of magnetism, she could accomplish feats of strength I could not approach. In her fragile system there seemed to reside a giant’s energy; but this was only at times, and especially after she had made some long journey into the regions of the air. The tissues and fibres of her body seemed to grow tenfold stronger when the new electric energy tingled along her nerves. In only the faintest way was I ever able to develop my electric-receptive sense so far as to realise what a new store meant to their physical powers.