There was some explosion in this chamber where we stand which killed them both, and since then he has worked alone.

His son--Miss Kellner's father--was the inventor of the machine which has enabled us to cut all the stones I showed you.

I mailed the application for patent on this machine to Washington three days ago.

It is as intricate as a linotype and delicate as a chronometer, but it does the work of fifty expert hand-cutters.

Until patent papers are granted I must ask that I be allowed to protect that." Mr.Latham turned upon him quickly.
"But you've explained all this to us fully," he exclaimed sharply, indicating the cube and the guns.