There was enough to do merely to make his way through the narrow and crowded streets. He had to display his baton often to clear a path, though when he approached the harbor area he had less trouble because the streets were much wider. Here great wagons drawn by gangs of slaves carried huge loads to or from the ships. The thoroughfares had to be broad, else the people would have been crushed between wagon and house. Here also were the so-called Pens, where the dock-slaves lived. Once the area had actually been an enclosure where men and women were locked up for the night. But the walls had been torn down and new houses built in the old Duke's time. The closest Earthly parallel Green could think of for these edifices was a housing project. Small cottages, all exactly alike, set in military columns. For a moment he considered stopping off to see Amra, then decided against it. She'd get him tied up in an argument or something, and he'd spend too much time trying to soothe her, time that should be spent at the marketplace. He hated scenes, whereas Amra was a born self-dramatist who reveled in them, almost wallowed, one might say. He averted his eyes from the Pens and looked at the other side of the street, where the walls of the great warehouses towered. Workmen swarmed around them, and cranes, operated by gangs pushing wheels like a ship's capstan, raised or lowered big bundles. Here, he thought, was a business opportunity for him. Introduce the steam engine. It'd be the greatest thing that ever hit this planet. Wood-burning automobiles could replace the rickshaws. Cranes could be run by donkey-engines. The ships themselves could have their wheels powered by steam. Or perhaps, he thought, rails could be laid across the Xurdimur, and locomotives would make the ships obsolete. No, that wouldn't work. Iron rails cost too much. And the savages that roved over the grassy plains would tear them up and forge weapons from them. Besides, every time he suggested to the Duke a new and much more efficient method of doing something he ran dead into the brick wall of tradition and custom. Nothing new could be accepted unless the gods accepted it. The gods' will was interpreted by the priests. The priests clutched the status quo as tightly as a hungry infant clutches its mother's breast or an old man clings to his property. Green could make a fight against the theocracy, but he didn't feel it was worth while to become a martyr. He heard a familiar voice behind him calling his name. "Alan! Alan!" He hunched his shoulders like a turtle withdrawing his head and thought desperately for a moment of trying to ignore the voice. But, though a woman's, it was powerful and penetrating, and everybody around him had already turned to see its owner. So he couldn't pretend he hadn't heard it. "ALAN, YOU BIG BLOND NO-GOOD HUNK OF MAN, STOP!"