[S255] Ancestry.com, 1900 United States Federal Census, (Name: Ancestry.com Operations Inc; Location: Provo, UT, USA; Date: 2004;), Year: 1900; Census Place: Thayer, York, Nebraska; Roll: 942; Page: 8A; Enumeration District: 0181; FHL microfilm: 1240942.
Record for William Callahan http://search.ancestry.com/cgi-bin/sse.dll?db=1900usfedcen&h=65407514&indiv=try