He no longer shambled to Sanitation and back. He felt the corridor walls, noted doors, noted their texture, counted, listened, deduced, and reported. He made a note of every separate step in the Sanitation pens and reported them to Jiz. The questions he whispered to the men around him in the shower and scrub rooms had purpose. Together, Foyle and Jisbella built up a picture of the routine of Gouffre Martel and its security system.