Tammy didn't give up. She decided to try to compare the voices herself - and again a misfire. Norton's voice somehow differed from one and the other. Tammy listened to the voices of the men again and again. Unfortunately, they passed far enough from the sensors, there was a lot of extraneous noise: both the noise of the wind and the noise of crumbling stones underfoot. The men spoke in raised tones, anger and irritation in their voices. In the voice and manner of speaking of both, there was no special distinctive note. Normal voices, no hoarseness, no stuttering, no distortion of sounds - nothing. Tammy began to listen to...