It was through one of these that the “Albatross” headed, after slackening speed so as not to dash against the walls of the canyon. The steersman, with a sureness of hand rendered more effective by the sensitiveness of the rudder, maneuvered his craft as if she were a crack racer in a Royal Victoria match. It was really extraordinary. In spite of all the jealousy of the two enemies of “lighter than air.” they could not help being surprised at the perfection of this engine of aerial locomotion. In less than two hours and a half they were through the Rockies, and the “Albatross” resumed her former speed of sixty-two miles an hour. She was steering southwest so as to cut across Utah diagonally as she neared the ground. She had even dropped several hundred yards when the sound of a whistle attracted the attention of Uncle Prudent and Phil Evans. It was a train on the Pacific Railway on the road to Salt Lake City. And then, in obedience to an order secretly given, the “Albatross” dropped still lower so as to chase the train, which was going at full speed. She was immediately sighted. A few heads showed themselves at the doors of the cars. Then numerous passengers crowded the gangways. Some did not hesitate to climb on the roof to get a better view of the flying machine. Cheers came floating up through the air; but no Robur appeared in answer to them. The “Albatross” continued her descent, slowing her suspensory screws and moderating her speed so as not to leave the train behind. She flew about it like an enormous beetle or a gigantic bird of prey. She headed off, to the right and left, and swept on in front, and hung behind, and proudly displayed her flag with the golden sun, to which the conductor of the train replied by waving the Stars and Stripes. In vain the prisoners, in their desire to take advantage of the opportunity, endeavored to make themselves known to those below. In vain the president of the Weldon Institute roared forth at the top of his voice, “I am Uncle Prudent of Philadelphia!” And the secretary followed suit with, “I am Phil Evans, his colleague!” Their shouts were lost in the thousand cheers with which the passengers greeted the aeronef. Three or four of the crew of the “Albatross” had appeared on the deck, and one of them, like sailors when passing a ship less speedy than their own, held out a rope, an ironical way of offering to tow them. And then the “Albatross” resumed her original speed, and in half an hour the express was out of sight. About one o’clock there appeared a vast disk, which reflected the solar rays as if it were an immense mirror. “That ought to be the Mormon capital, Salt Lake City.” said Uncle Prudent. And so it was, and the disk was the roof of the Tabernacle, where ten thousand saints can worship at their ease. This vast dome, like a convex mirror, threw off the rays of the sun in all directions.