After Tom had had many adventures on his motor cycle he acquired a motor boat, and in that he and Ned went through some strenuous times on Lake Carlopa, near Tom’s home.  Then followed an airship, for Tom got that craze, and in the book concerning that machine I related some of the things that happened to him.  He had even more wonderful adventures in his submarine, and with his electric runabout our hero was instrumental in saving a bank from ruin by making a trip in the speediest car on the road.

After Tom Swift had sent his wireless message, and saved the castaways of Earthquake Island, he thought he would give up his inventive work for a time, and settle down to a life of ease and quiet.

But the call of the spirit of adventure was still too strong for him to resist.  That was why he sought out the diamond makers, and learned the secret of Phantom Mountain.  And when he went to the Caves of Ice, and there saw his airship wrecked, Tom was well-nigh discouraged, But he managed to get back to civilization, and later undertook a journey to elephant land, with his powerful electric rifle.

Marvelous adventures underground did Tom Swift have when he went to the City of Gold, and I have set down some of them in the book bearing the latter title.  Later on he sought the platinum treasure in his air glider.  And when Tom was taken captive, in giant land, only his speedy airship saved him from a hard fate.

By this time moving pictures were beginning to occupy a large place in the scientific, as well as the amusement world, and Tom invented a Wizard Camera which did excellent work.  Then came the need of a powerful light, to enable Uncle Sam’s custom officers on the border to detect the smugglers, and Tom was successful in making his apparatus.

He thought he would take a rest after that, but with the opening of the Panama Canal came the need of powerful guns to protect that important waterway, and Tom made a Giant Cannon, which enabled the longest shots on record to be fired.

Now, some months had passed, after the successful trial of the big weapon, and Tom longed for new activities.  He found them in the idea of a photo telephone, and he and his father were just talking of this when interrupted by the accident to the birdman on the roof of the Swift home.

“Have you got that ladder, Rad?” cried the young inventor, anxiously, as he saw the dangerous position of the man from the airship.

“Yas, sah, Massa Tom!  I’se a-camin’ wif it!”

“And where’s Koku?  We’ll need him!”

“He’s a-camin’, too!”

“Here Koku!” exclaimed a deep voice, and a big man came running around the corner of the house.  “What is it, Master?”

“We must get him down, Koku!” said Tom, simply.  “I will go up on the roof.  You had better come, too.  Rad, go in the house and get a mattress from the bed.  Put it down on the ground where he’s likely to fall.  Lively now!”