They were back at the field by half-past seven, ready to start.

But the field was horribly muddy. Other planes had encountered severe difficulty in taking off, and the attendants looked doubtful.

“Looks as if you’re not going after all,” remarked Sam, stepping close to the Ladybug, as Linda started the rotor blades in motion. “It’s a beastly day.”

Linda smiled.

“My rotor blades are going to help me to rise,” she returned, gaily. “Just watch ’em!”

Two minutes later the autogiro left the rain-covered field, and soared into the murky skies. Almost immediately the ground and the landmarks became invisible to the girls in the cockpits, and the plane seemed to be wrapped in a great gray blanket of clouds and rain. The wind was blowing furiously, as if it were determined to get the better of the gallant Ladybug, but the rotor blades of the autogiro succeeded in keeping her on an even keel. But she rocked furiously, until Dot felt sure that she was going to be seasick.

Linda’s gas was growing a little low—plenty, she felt sure, to get to Kansas City—but not any to waste, so she was keeping low. But she could not see anything, and she was thinking that at times like these flying could even be monotonous, when, all of a sudden, as if in a hideous dream, she saw a nineteen-story building rushing madly at her. Not that she realized that it was exactly nineteen stories—indeed it looked taller than that at the moment. It was huge, too big to avoid, as it loomed there in her path, like some tremendous, horrible monster, shutting out everything else in her sight, waiting to annihilate her.

In the seat ahead Dot suddenly let out a sharp cry of terror, and Linda, realizing in a flash that she could not hope to clear the building now, pushed the joy-stick forward and nosed the plane into a dive. What was she heading for? A street, where she would dash down on top of pedestrians and motor-cars, killing others as well as herself and Dot?... But no, the speed was reducing; she was right over another office building—a shorter one, only about six stories in height—with—oh, joy of joys—a flat roof! As if she had planned it, she selected her spot, banked the autogiro to the left, cleared the wire fence around the edge, and landed right in the center of the roof! Making it look all the world as if she had planned a demonstration.

With a grin of incredulity she turned exultantly to Dot.

“Linda, you’re priceless!” shouted her chum. “Anybody’d think it was a stunt for the movies.”