"They will never know that," I declared with entire confidence. "I can
tell you both that the secret experiments of Ashton and myself have been
crowned with success. We have, however, been most wary and watchful.
We are well aware that at our works out at Gunnersbury there have been
intruders, but those who have dared to enter at night to try and
discover our plans have been entirely misled and, up to the present, no
single person beyond ourselves has ever seen, or has ever gained any
knowledge whatsoever of that electrical arrangement which constitutes
our discovery."
"Then you really can fight Zeppelins?" asked Barton, much interested.