Naturalization records do exist for D.M. County. The kind and helpful people at the Des Moines Historical Society in Burlington found my ggg grandfather's papers filed with the county court and recorded Oct. 7, 1848. Their address is: Genealogical Society, Inc. P.O. Box 493 Burlington, IA 52601 Their e-mail is: dmcgs@yahoo.com What metro area are you near? Liz Shreve in Idaho