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.1146

H. P. Frederickson, general blacksmithing and horseshoeing a specialty. He learned his trade in Denmark. He was born in Denmark Sept. 25, 1853; emigrated to America in June, 1871, and settled in Manistee, Mich., and followed his trade on year; then to Clem Lake a short time; then to Detroit, Mich., where he followed his trade about eighteen months; then to Grand Rapids, Mich., and worked at his trade a short time; then to Ft. Wayne, Ind.; worked a short time and in various places some time; also in Chicago, fifteen months, and finally located in Oshkosh, Wis., where he is doing a fair business.