"Thank you," murmured Kathleen.
"I think I had better go upstairs and see to everything," and the spinster rose.
"Just a minute," Miller hesitated. "I felt that another and more determined attempt would be made to get Mr. Whitney's invention, Kathleen, and so suggested to him that he trust me with the drawings and specifications."
"Did he?"
"Yes, and I took them over and deposited them in the care of Chief
Connor."
"A capital idea," exclaimed Foster.
"Then father's inventions are quite safe?" asked Kathleen.
"Yes. One is a camera for taking a map of the country from an airship; the other, still more marvelous—glass armor."
"Glass what!" chorused his listeners.
"Armor. A suit woven from a combination of mica and glass which Mauser bullets cannot penetrate."