An English knight named William De Braose claimed an arrow “had penetrated his chain mail and clothing, passed through his thigh and saddle and finally entered his horse.”
highly unlikely given the results of current era testing of chain mail struck with period correct bodkin points powered by period correct longbows. at best, if the distance was really close, the bodkin might have opened up or slightly passed through a knight's chain mail.
When a bowman could strike down a squirrel at 100 paces, he was judged proficient enough to enlist in the army.
that sort of archery rhetoric is sprinkled throughout "the white company" and is far more wishful thinking than fact ... even for a howard hill.
surviving writings of those long ago centuries dictate that archers were by and large considered less a soldier and in fact inferior since there was no face-to-face conflict with the enemy as it appears that chivalry was an important element in warfare.