“We are going to count the sparks,” he told Roger, “just to check up on the speedometer attached to the flywheel, which Millman says is off-count by hundreds of revolutions to the minute.”
“I’ll take the record up and have it made ready for a slow playback. I’m going up anyway.”
He turned it over to Potts as the note had been thoroughly revealed in all his exposures, and had shown no identifying finger-marks.
Roger went back to Astrovox, and became deeply interested in the latter’s plans for night study of the spectra of stars.
“I wonder if your cousin would arrange for one of his men to stay part of the night with me, to take down my data?”
“We can set up a dictograph, and let you talk it onto a record.”
“That would do.”
“Or—we could mike down from here to one of our magazine-recorders that puts a new record on the spindle of the turntable when the other has been used up. That would run you for hours, if you’d stop it in between dictating periods.”
The thing was arranged and Roger, before going home, demonstrated the mechanism and was sure the old man understood its operation.
Because of the threat implied in the forged note, Grover gave Potts instructions to transfer from Doctor Ryder’s rooms the mechanisms he wanted to have installed for Roger’s protection. With a changed switch operated only from inside the room, the former ease of operation by others, he thought, was eliminated.