 Why had Roger been trained by Opal?
Eudalia had been a female foreman in a garment-cutting shop before being captured and brought through. It arrived before the meal, materializing against one of the seven walls of the roofless chamber. Dana stood almost in the center of the room, carmine-tipped fingers clasped beneath the swell of her breasts. "In the one instance, we're the hunters, the breeders, the trophy collectors. He had felt the inner tug of command, said good-by to the women and returned to his smaller compound within its own barrier dome. As in all of this strange universe, excepting the dome-cages in which the captives were held, the training hall followed no rules of three-dimensional space.
 because Opal was unable to bring other men back
 because Opal wanted to further his experiment  because Opal needed help building a new gateway  because Opal was looking for someone to take his place  because Opal was unable to bring other men back