“Move, Sergeant!” shouted the major.

The sergeant moved and, sure enough, there he was!

“I had him spotted all the time,” said The Doctor.

The major directed the sergeant to change to a costume of a different hue. When the change had been made we were required to turn our backs till he had “hidden” himself again. Again he was “in plain sight,” and again we had to give up. Again he was ordered to move, and we saw him, this time in colors diametrically opposed to those of his first garb.

“I had him spotted all the time,” said The Doctor.

The sergeant went through his entire repertory of tricks, but the rest must not be reported.

It occurred to me on the way back to our machines that some football coach could make a fish out of the defensive team by camouflaging his back field.