Cavalier County

William J. Mooney, born on September 29, 1858, in Watertown, Wisconsin, was a prominent figure in Langdon, North Dakota. His parents, Irish immigrants, settled in America during their youth. Mooney graduated from the College of the Sacred Heart in 1875 and pursued a legal career, being admitted to the Wisconsin bar. In 1881, he moved to Bathgate, North Dakota, and co-founded the law firm Stack & Mooney. Mooney played a crucial role in organizing Cavalier County and developing Langdon, where he owned several townsites and banks. He had extensive business and real estate interests. Tragically, he died in 1908 during a European trip when his ship collided with another vessel.