Jacques LeBeau was the leader of the New Orleans Thieves Guild in the second half of the 19th century. He was the husband of Rochelle and the father of Jean-Luc.^[1] In 1887, the guild was tasked by their benefactress, Candra, to secure the Momentary Princess, a gem that granted visions of the future. They failed, which led to Candra withdrawing her benefaction, and kidnapping Jacques' son Jean-Luc and Jacques' guildmate Rouler Marceaux's son, Belize. Desperate for a return to the previous arrangement, in 1891 Jacques accepted a challenge from Candra's underling, the Tithe Collector, to secure information about the gestation chamber of the slumbering En Sabah Nur. He got the first part of the puzzle with the help of a stranger he dismissed as "le diable blanc", but vowed he would secure the rest of the information from the holdings of the doctor who had it, Nathaniel Essex.^[2]

However, when he tracked the doctor to an underground vivisection laboratory in New York City, he was swiftly overpowered, and only escaped due the late arrival of "le diable blanc", who brokered a deal to secure his freedom.^[3] With his freedom, Jacques and the guild used Dr Essex's information to find the prison of Ozymandias, under the Egyptian pyramids. Here, Ozymandias offered them the run of his information on their central obsession, the "old kingdom". Candra, who had been shadowing the thieves, revealed herself, incapacitated Ozymandias and set the thieves to work. However, she was stymied by the sudden arrival of Nathaniel Essex, and fully stopped by the arrival of the Externals.

With the pact restored and the adventure ended, Jacques was not pleased by the prospect of giving up the information they had just secured about the "old kingdom", but agreed to turn it over to "le diable blanc" via Essex's gruesome methods on receiving a vow that the information would be returned to the guild during the leadership of Jean-Luc. With this promise, he consented to the procedure, and returned to New Orleans to live out the rest of his life.^[4] In 1923 he was voted out of his position as guild patriarch, in favor of his son.^[5]