Edmond Hamilton 
The Man Who Saw the Future 

JEAN DE MARSELAIT, Inquisitor Extraordinary of the King of France, raised his head from the parchments that littered the crude desk at which he sat. His glance shifted along the long stone-walled, torchlit room to the file of mail-clad soldiers who stood like steel statues by its door. A word from him and two of them sprang forward.
‘You may bring in the prisoner, ‘ he said.
The two disappeared through the door, and in moments there came a clang of opening bolts and grating of heavy hinges from somewhere in the building. Then the clang of the returning soldiers, and they entered the room with another man between them whose hands were fettered…