“How did you get in? What do you want?”
A few instants of silence. How could the answer fail to be recorded? Roger thought swiftly that a whisper should have left a faint report of its existence.
“It isn’t here.... Look, then.... What do you know about any laboratory?... I don’t know the combination to any safe!... Yes, let’s go there. I will be very glad to go with you, Clark! The great Joseph Z. Clark——”
Only Doctor Ryder’s very easily identified voice gave the responses and although Roger cut in more output power and added a stage of transformer-coupled audio, the speakers gave no intermediate words.
They were easily guessed at, of course.
Potts, bringing the film, still sopping, groaned.
“Not a thing on it. Wasn’t even exposed.”
Grover and Roger looked.
When light acts on a silver-bromide emulsion, it develops dark grains of silver where light has fallen, leaving the shadows unaffected within the degree that they lack light, thus giving the shadings that become a picture in the positive print.
All over, and for its whole length, the film that had run fully three minutes showed as clear of developed silver as if it had not run through the machine as evidence proved that it had done.