Bartleby is a level 10 quest giver located in Old Town in the human city of Stormwind. He is a drunk that human warriors must deal with during their level ten quest chain. Harry Burlguard, putting your skills to the test, tasks you with obtaining Bartleby's Mug from the drunk. A scrap might ensue.
Some speculate that this NPC is a reference to a character of the same name in Kevin Smith's 'Dogma'.