The misericorde dagger or poignard is said to be a tool used to finish off armored opponents. Is there any account on where a knight would have it on his person?
I would imagine a knight would want one to be easily accessible, yet being too accessible risks the weapon being taken from your belt and used against you. Perhaps crowing your side with handles would also be a concern.
Are there accounts of where other types of soldiers kept their daggers on the eve of battle?
A medieval soldier would generally have his dagger (of whatever variety) hanging from his belt, where it was easy to access. Often it seems to have hung from the opposite hip as the sword (presumably for reasons of balance and ease of drawing it), although some might also have carried it more towards the back. You can frequently see art depicting soldiers with swords on one hip and daggers on the other: these unsavory gents, note the ballock knife that one is sporting, this extremely chill knight, and this more pious bunch, who all seem to be hanging their daggers in slightly different ways.
