And the joy of Mary Nestor, when she found that it was Tom who had saved her parents, can well be imagined.  As for our hero, well, he was glad too—­for Mary’s sake.

“I won’t forget my promise to you, Tom Swift,” said Mr. Barcoe Jenks, as he parted from the young inventor, and what the promise was will be told in the next volume of this series, to be called:  “Tom Swift Among the Diamond Makers; or, The Secret of Phantom Mountain.”  In that Tom is destined to have many more surprising adventures, as is also Mr. Damon, who learned new ways to call down blessings on himself and his possessions.

And now, for a time, we will take leave of the young inventor and also of his many friends, who never ceased to wonder over Tom Swift’s skill with the wireless.

THE END