If it may help: Likely marriage record-Wilhelm Lange and Marie Muller-Aug.12,1860 in Austin,TX Death certificate of only child,Fritz John Lange gives parents as William Lange and Mary "Miller"-"Miller" unlikely given that she was also born in Germany. 1870 census in Austin,TX-William Lange,age 31,Mary Lange age 50,son Fritz age 9. 1900 census-Washington Co.,TX:William,born July 1840,Mary,born June 1820;married 45 years;one child born,one living. Next door is son Fritz: Fritz,born Oct.1861;wife Dora,born Oct.1863;daughter Hattie,born Mar.1883;son Charles,born June 1884;son Willie,born Jan.1886;daughter Mary,born Aug.1888;son Fritz A.,born Aug.1889;daughter Regina,born Jan.1891;daughter Dora E.,born Sept.1892. 1910 census same place,Fritz and Dora have added 8 year old twins,Alfred and Margaret. The widowed William lives with them. By 1920 in Mason County. Fritz Lange was married to Dora Struve on Feb.16,1882 in Burleson County. He died Feb.2,1939 in Mason Co. and she June 23,1946. The 1910 census states that she had born 10 children, but only 6 were alive in that year. Some one else's research gives a death date for Mary Lange as Dec.1906. It would appear that most are buried in Gooch Cemetery in Mason Co.