Brown Bernarr is a ranger of the Night's Watch. He knows some herblore and snores loudly.
Brown Bernarr is part of the great ranging beyond the Wall, that sets out from Castle Black. He is one of the chosen few who sleep within Craster's Keep.
Brown Bernarr is charged with carrying the medicinal supplies from Maester Aemon during the ranging. He is killed during the fight at the Fist, however.