1835 - 1909 Composer of "[When the mists have rolled in splendor]" in Deseret Sunday School Songs An early Danish Mormon (baptized into the LDS church in 1853); emigrated to Utah 1862. Organized a Scandinavian choir in Salt Lake City. Moved to Hyrum, Utah, in 1868 and was active in local government as well as in the church, serving as choir director to the Hyrum stake.
--based on the Wikipedia article, much condensed
H. H. Petersen