Don't know if this is the same Fred Langbein, but there was one married in Beadle County.
Fred H. Langbein and Nellie M. Jerome of Howard, Dakota, were married at the Methodist parsonage in Huron on Sunday evening, August 1, 1886, by Rev. A.W. Adkinson.
--The Daily Huronite, Huron Dakota Territory (South Dakota)
August 2, 1886, page 3