“Speaking of diamonds, look here!” exclaimed Mr. Damon, suddenly, and he pulled out a double handful.

“Where did you get them?” cried the others in astonishment.

“I grabbed them up, as we ran from the cave,” said the eccentric man; “but, bless my gaiters!  I forgot all about them until you spoke.  We’ll share them.”

These diamonds, some of which were large, proved very valuable, though the total sum was far below what Mr. Jenks hoped to make when he started on the remarkable trip.  Tom gave Mary Nestor a very fine stone, and it was set in a ring, instead of a pin, this time.

On their arrival in Shopton, where Mr. Swift, the housekeeper, Mr. Jackson and Eradicate Sampson were much alarmed for Tom’s safety, an attempt was made to manufacture diamonds, using a powerful electric current instead of lightning.  But it was not a success, and so Mr. Jenks concluded to give up his search for the secret which was lost on Phantom Mountain.

And now we will take leave of Tom Swift, to meet him again soon in other adventures he is destined to have in the caves of ice and the valley of gold.

THE END

THE TOM SWIFT SERIES

By Victor Appleton

Tom swift and his motor cycle
Or Fun and Adventure on the Road
tom swift and his motor boat
Or The Rivals of Lake Carlopa
tom swift and his airship
Or The Stirring Cruise of the Red Cloud
tom swift and his submarine boat
Or Under the Ocean for Sunken Treasure
tom swift and his electric runabout
Or The Speediest Car on the Road
tom swift and his wireless message
Or The Castaways of Earthquake Island
tom swift among the diamond makers
Or The Secret of Phantom Mountain
tom swift in the caves of ice
Or The wreck of the Airship
tom swift and his sky Racer
Or The Quickest Flight on Record
tom swift and his electric rifle
Or Daring Adventures In Elephant Land
tom swift in the city of gold
Or Marvelous Adventures Underground
tom swift and his air glider
Or seeking the Platinum Treasure
tom swift in captivity
Or A Daring Escape by Airship
tom swift and his wizard Camera
Or The Perils of Moving Picture Taking
tom swift and his great Searchlight