[S3303] Ancestry.com, 1870 United States Federal Census, (Name: Ancestry.com Operations, Inc.; Location: Provo, UT, USA; Date: 2009;), Year: 1870; Census Place: Camp, Polk, Iowa; Roll: M593_415; Page: 110B; Image: 224; Family History Library Film: 545914.
Record for William Beck http://search.ancestry.com/cgi-bin/sse.dll?db=1870usfedcen&h=21366108&indiv=try