That was intentional. To not be interrupted. It was wise in the end to not bring a weapon and alarm everyone when he did not even show up.

There are many different types of torture, but almost all of them are wasteful in some way. It is a show of power to inflict relatively mild injury that slowly. Bleeding is relatively easy to endure, as it takes several minutes to bleed to death. Blunt methods, like the rack, are quite imprecise. Burns even more so. What humans know they need most to survive is not food or drink, not even blood, but air.

Even then, there are differences between the methods. Pressuring the neck, or the nose and mouth, it is very easy to apply too much force or too little. No, there is only one perfect method to use if you want to make someone fear death at the touch of your hand, and leave no other scar.

[Jeanne pushes two levers in opposite directions. Father's cage is turned diagonally, a corner pointing down, putting him on shaky footing. He's made of monstrous enough material that he can resist succumbing even if this angle causes the water level to submerge him, but a bad time is coming.]

Waterboarding.