The snapped gudgeon pin from Miller Tom’s pit wheel lay on the central pine work table, resting on a thick pad of clean wool waste to protect the wood. It was an iron metal tube six inches in width and eighteen inches long, its fractured face displaying the coarse, crystal-clear gray grain characteristic of cold-poured foundry iron. Across the center of the break ran a smooth, polished shear plane, proving that the shaft had not failed through gradual fatigue. But had been ripped apart in a single split second by an irresistible twisting shock.
Inspector Korr Var adjusted his glasses. He held a magnifying lens and a brass thread gauge over the fracture. Beside him, Pella Rook compared the time of the mill collapse—quarter to six—with the heat and pressure ledger Varo Nenn had stolen from Sorell’s private study.
‘Look at entry seventeen-forty-five,’ Pella pointed out, her brass metal pen touching the academy parchment. ‘At five-forty-five, Sorell engaged the backup astral choke on the High Terrace. He dropped Gate Three from four feet down to two feet in twelve seconds. That created a water-pressure hammer of forty-eight thousand foot-pounds in the lower town trunk.’
‘And at five-forty-seven,’ Korr Var added. His iron rule tapped the fractured gudgeon, ‘that hammer reached the mill tailrace, hit the sixteen-foot pit wheel like an iron battering ram. Then he snapped this six-inch gudgeon in two. The correlation is not eighty percent, Councilman. It’s one hundred percent total.’
