Father Pierre-Jean DeSmet, also known as Pierre DeSmet and Peter DeSmet, a Roman Catholic priest and member of the Society of Jesus, was a native Belgian who became the most trusted of the white men among the Native Americans of the Western United States in the mid-1800s. He first came to America in 1821 to begin his novitiate at White Marsh, Maryland, a Jesuit estate near Baltimore. Later he was moved to Florissant, Missouri, where he was ordained on Sept. 23, 1827. Wikipedia
The definitive Wikipedia entry for Pierre-Jean de Smet. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Pierre-Jean_De_Smet
Missionary among the North American Indians, b. at Termonde (Dendermonde), Belgium, 30 Jan., 1801; d. at St. Louis, Missouri, U.S.A., 23 May, 1873 www.newadvent.org/cathen/04752a.htm