 How did Zarwell lose his memories?
The floor continued its transmutation, and Zarwell sank deep into viscous depths. Zarwell moved among them, seldom taking part in the individual clashes, yet a moving force in the conflict . Zarwell was not the leader of the invaders, only a lesser figure in the rebellion. When Zarwell arrived, six months before, the vitalized area already extended three hundred miles along the coast, and sixty miles inland. Zarwell pulled his sun helmet lower, to better guard his hot, dry features. After its three-thousand-mile journey across scorched sterile rock, it sucked the moisture from a man’s body, bringing a membrane-shrinking dryness to the nostrils as it was breathed in.
 Zarwell had his memories removed so he could get out of the revolution business.
 A soldier hit Zarwell in the head with the butt of a gun, leaving him with amnesia.  Zarwell was knocked unconscious when a building collapsed around him. He awoke with amnesia.  Zarwell had his memories removed so he could get out of the revolution business.  A bullet grazed Zarwell's head during the last revolution, leaving him with amnesia.