History of northern Wisconsin: containing an account of its settlement, growth, development, and resources, an extensive sketch of its counties, cities, towns and villages, their improvements, industries, manufactories, biographical sketches, portraits of prominent men and early settlers, views of county seats, etc. Chicago: Western Historical Co., 1881. p.1157

Sebastian Ostertag, was born in Wurtemberg, Germany, April 21, 1839; came to Wisconsin with his father in 1847, and remained on a farm near Oshkosh until the rebellion began; enlisted in Oshkosh in April, 1861, in Co. E, 2d Wis. Vol.; served three years and was mustered out at Washington June 16, 1864. He came home on a furlough in 1862, and was married in Oshkosh to Miss Sophia Kuebler, a native of Bavaria; they have five children- Albert J., Eddie S., Ida M., Theodore L. and Litta H. S. Mr. Ostertag is a member of the Turners' Society, the Sons of Hermann and the G. A. R.