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.1182

Carl Koch, dry goods, grocery and saloon, was born in Bavaria, Germany,
Feb. 2, 1830; came to the United States in 1852; located in New York City
for a time; was then in Johnstown, Penn., in the grocery business; moved to
Milwaukee, and from there, in 1855, to Menasha; opened a saloon at first;
has been in present business some sixteen years. Now carries a stock of
about $10,000, and does a business of $25,000 to $30,000 yearly. He was
married in Menasha May 20, 1855, to Miss Mary Sturn. They have five
children- Emma, Caroline, Carl, Lizzie and Arthur. Mr. K. is a Notary
Public, has been a Justice of the Peace three terms, Alderman one term,
Clerk of the Board of Supervisors one term.