From "History of La Crosse County, Wisconsin", 1881, p. 770. City of La Crosse ERNST LANGE, foreman and engineer in the factory of Segelke, Kohlhaus & Co., was born in Watertown, Wis., in 1850; son of A. W. Lange, who is still living in Watertown, at the age of 65. Mr. Lange came to La Crosse when 15 years of age, and has worked in the same factory ever since. He was married in October, 1873, to Louisa Guggenbuehl, a native of Switzerland; has three children living - Louisa, Adolph and Bertha. One son, Ernst, died in infancy in 1878. [I am not related to this family and have no further information. I'm posting this as a service and hope it helps!]