|Summary:||This collection consists of records collected and created by the Oscar Mueller family. The records document their professional and personal lives spanning from 1856 to 2017. Oscar Mueller's papers span from 1864 to 1997 and mainly consist of his activities as a lawyer and an amateur historian. Record types include correspondence, biographical articles, masonic membership documents, obituaries, certificates and diplomas, court papers, financial records of attorney fees, real estate contracts and deeds, and research material files. Josephine Mueller's papers span from 1890 to 1977 and mainly consist of her activities in community groups and organizations. Record types include correspondence, masonic membership documents, obituaries, diaries, and real estate documents. George Mueller's papers span from 1861 to 2013 and mainly consist of his correspondence and historical research activities. Record types include certificates and diplomas, military, employment, financial, educational transcripts, membership and organizational, and legal documents. Glenn and Helen Mueller's records span from 1910 to 2016 and mainly consist of biographical and historical materials. Record types include correspondence, diaries, military, and subject. The Cook Family records span from 1856 to 2017 and mainly consist of genealogical records. Record types include correspondence, diaries, legal, and newspaper clippings. Also included is the correspondence between George and Glenn to their parents during their military service in World War II.