Below the big bag was the body of the ship, consisting of an enclosed framework, divided into several compartments. There was a living room, or cabin, a room where several berths provided ample sleeping accommodations, the motor or engine room, and a cooking galley. From the engine room the big propellers, two of them, could be controlled, as could also the rudders, one designed to send the ship to right or left, and the other to elevate or depress it. There was a small pilot house for the steersman, and windows in the cabin affording a view on all sides, while heavy glass ones in the bottom of the car enabled the occupants to look down on the earth below. There were lockers for the storage of food, supplies and the necessary materials for making the lifting gas on board, so that, if necessary, the bag could be filled even while the ship was in motion.
Jerry walked all about the craft, noting every feature. He saw that comparatively few repairs would be needed before he and his chums could set sail in it.
“Then we’ll start for the west,” Jerry said, talking to himself. “We’ll have to hustle to beat Noddy and that gang, for they evidently expect to get that gold mine away from us if they can. Then there’s this matter of Mr. Bell. I can’t understand that at all. Why was he with Noddy? What did he want of an airship? Was he really here at all, or was it some one who looked like him, and who helped Noddy to steal our Comet? I wish I could answer those questions. Maybe it wasn’t Mr. Bell, after all. It might have been one of the Dalsett gang, dressed up to represent him.”
As he thought of this possibility Jerry became uneasy. He began to wish Bob and Ned would return, for he feared Noddy might come back at any minute, accompanied by some of the scoundrels with whom he associated, and regain possession of the airship. But, as he thought of the broken plane, and realized that there was scarcely any gas in the bag, Jerry knew that whoever came could not run away with the flying craft.
He walked through the cabin again, and near one of the seats he noticed some torn pieces of paper. Idly he picked them up, and, as he scanned them, thinking more of the recent events he had passed through than of anything else, he saw that the fragments bore writing. One of the pieces contained a name—Thomas Bell—and at the sight of that Jerry uttered a cry:
“Tommy Bell!” he exclaimed. “Why that’s the name of Mr. Bell’s son—the one we rescued from the Mexicans! This looks like a letter written to him, and afterward destroyed. I wonder if I can make out anything from it? I’ll try, for maybe he and Mr. Bell are in trouble, and I can help them.”
With nervous fingers Jerry sought to piece together the fragments of the torn letter. But it was not all there. Only disconnected words could be made out, but from these the tall lad decided that it was a missive written by Jackson Bell to his son, but, for some reason, torn up before it was sent. And from the words he could decipher Jerry felt that he held in his hands some clew to the mystery—the mystery of the air, which Mr. Bell had set out to solve with Noddy and Jack, who had deceived him. For Jerry read such words as “will try to help them,” “can now get to the deep valley,” “they may yet be alive,” “Noddy is friend of the motor boys——”
“That’s where he’s wrong,” commented Jerry, grimly. Then he found a larger fragment, which he had overlooked. It contained these words: “and so Tommy, my boy, you may soon expect me back in the west, and together we will go to the aid of those people, some of whom were my friends, so long and so mysteriously lost. I feel that we can save them in the airship, which I thought of as a last resort, after reading what Jerry Hopkins and his chums had done in their wonderful craft. I will soon be with you. Jackson Bell.”
“Jackson Bell!” cried Jerry, springing to his feet, and staring at the signature on the scrap of paper. “Then Mr. Bell has been here—in this ship—there is no doubt of it! He wrote this letter to his son, but it was torn up, and never posted. Can there have been foul play here? Have Noddy and Jack made away with Mr. Bell?” The thought was too terrible. Jerry dismissed it at once, yet he could not help adding:
“The mystery is deepening. There are three puzzles now to solve. How to save our mine, how to rescue the people of the valley, and how to find Mr. Bell.”