In addition to other documents, Heebøll-Holm focused on three texts written by a 14th-century French knight named Geoffroi de Charny, who was also a diplomat and trusted adviser to King John II.
No one knows for sure why Charny wrote the documents, whose translated titles included "The Book of Chivalry" and "Questions Concerning the Joust, Tournaments and War." The most popular theory is that they were part of an effort to create an ideological program for the royal French chivalric order that would rival the British equivalent.
Though many of these texts have been thoroughly analyzed already, Heebøll-Holm was the first to look between the lines through the lens of modern military psychology. And while it's hard to ever completely understand a culture that was so very different (and far more religious) than our own, Heebøll-Holm found a number of examples that would suggest at least the potential for trauma in medieval knights.
Among his writings, for example, Charny wrote:
"In this profession one has to endure heat, hunger and hard work, to sleep little and often to keep watch. And to be exhausted and to sleep uncomfortably on the ground only to be abruptly awakened. And you will be powerless to change the situation. You will often be afraid when you see your enemies coming towards you with lowered lances to run you through and with drawn swords to cut you down. Bolts and arrows come at you and you do not know how best to protect yourself. You see people killing each other, fleeing, dying and being taken prisoner and you see the bodies of your dead friends lying before you. But your horse is not dead, and by its vigorous speed you can escape in dishonour. But if you stay, you will win eternal honour. Is he not a great martyr, who puts himself to such work?"