Grace tightened her grip as the basket lurched. She knew now what the order meant. They were going fifteen hundred feet higher than they were. Her eardrums began to throb and her breath came in little short gasps. “Stop at thirty-five.” Again that disconcerting jolt and a violent swaying back and forth of the huge, ungainly bag over their heads. “How do you like it now?” called the officer in a jovial voice. Grace saw his lips move and knew he was speaking to her, though she could not hear a word he said. “I can’t hear you, sir.” “I thought so. Pinch your nose and swallow hard several times,” he shouted, himself performing the same operation on his own nose. Grace followed his direction, faintly heard, and something snapped in both ears. For the moment she thought she had ruptured her eardrums, but to her amazement discovered that she could hear as well as ever. “I think I am perfectly all right now, sir,” she said. “How queer!” “Decreased pressure,” answered Major Colt briefly. “We will make our weather report now if you will be good enough to remove the thermometer from the pocket behind you and throw it overboard.” “Throw it overboard? Do you mean it, sir?” He nodded. Grace thrust her hand into the pocket and, finding the instrument, dropped it over the side. To her surprise it stopped with a jolt when just below the level of the basket. It was attached to a slender wire. “Please haul it in in five minutes,” the major ordered. Then he gave through the telephone the wind velocity, which Grace was amazed to learn was thirty-eight miles an hour; then the barometer reading, and then he called for the temperature. “Twenty-eight, sir.” “Twenty-eight,” repeated the major through the telephone. “That duty done we will now proceed to enjoy ourselves. Hungry?” “I--I hadn’t thought about it. Now that you mention the subject I do realize that there is a sort of gone feeling in my stomach.” “We’ll have a bit of a bite. While I am getting it ready you see if you can find the American Army.” Grace studied the landscape ahead of them for a long time, and said she couldn’t see anything that looked like an army. He demanded to know where she was looking. “About where those little green hills are. I do not recall having seen those from the ground,” she said, lowering her glasses. The major chuckled. “Know where you are looking for the American Army? You’re hunting for it on the other side of the Rhine. Look down at an angle of about forty-five degrees. See anything?” “I think I do, but what I see doesn’t look like any army that I ever saw.” “You’re looking at the Third American Army, just the same. Now find the Boche army a little further out, but not too far.” “I have them, sir.” “What are they doing?” “Creeping in formation.” “Good! You are an observer already. Lean over and look down. Get used to it. Make you dizzy?” “A little. I get dizzy when the basket tries to lie down on its side, and feel as if I were going to fall out.”