red airship flying high over their heads. Rapidly the open fields slipped along, giving place to a large city.
"Rocksmond," murmured Tom, as he noted it. "We're about fifty miles from home, but we'll soon be back in the shed at this rate. We certainly are slipping along. A hundred and fifty feet elevation," he went on, as he looked at a gauge. I wonder if I'll ever get used to going several miles up in the air?"
He shifted the rudder a bit, to go to the left. The Red Cloud obeyed promptly, but, the next instant something snapped. Tom, with a startled air, looked around. He could see nothing wrong, but a moment later, the airship dipped suddenly toward the earth. Then it seemed to increase its forward speed, and, a few seconds later, was rushing straight at a tall, ornamental tower that rose from one corner of a large building.
"Mr. Sharp! Mr. Sharp!" cried the lad. "Something has happened! We're heading for that tower!"
"Steer to one side!" called the balloonist.
Tom tried, but found that the helm had become jammed. The horizontal rudder would not work, and the craft was rushing nearer and nearer, every minute, to the pile of brick and mortar.
