“Slade and Archer, Consulting Engineers,” said Archer.

It was a great triumph—one of the greatest of the world war, and the only reason that mankind has not heard more about it is probably because of the grudging German censor.

“I’m glad it went,” said Archer confidentially. “I was shaking in my shoes.”

“There wasn’t any reason to shake,” said Tom. “I knew it would go.”

“Same as we will.”

“Hush,” said Tom.


CHAPTER XXVIII

HE DISAPPEARS—FOR THE TIME BEING