Following is Charles Prehn’s obituary from July 17, 1968:
    Charles F. Prehn, president and general manager of Prehn Granite Quarries, Inc. died suddenly at his home in Wausau, Wis. on Wednesday, July 17, 1968.
Charley was well known in the granite industry, he was an active member of the Northwest Granite Manufacturers Association and the American Monument Association, Inc. He was also widely known in Junior Chamber of Commerce circles. He served as a state vice president of the JCC and was named “Mr. Jaycee” of the state of Wisconsin in 1952. Later he served as an ambassador of the organization and visited many foreign countries.
    Mr. Prehn was born June 13, 1918 in Wausau, Wis., son of attorney Arthur W. Prehn, the founder of the Rib Mountain Quarry. He was married to Marion Sherman, June 30, 1943 in Madison, Wis. He served in the Air Force during World War II and was a member of the Wausau Rotary Club.
    Survivors include his wife; three daughters, Mrs. William Leech, Waukesha, Wis., Carolyn and Elizabeth, at home; his mother, Mrs. A.W. Prehn of Wausau and two sisters, Mrs. Arthur Vint, Scottsdale, Ariz. and Mrs. William Nielson, West Bend, Wis. and one grandson.
    Funeral services were held at 2 p.m. on Friday, July 19th at the First Presbyterian Church. The Rev. Donald Dinsmore officiated
and burial was in Restlawn Memorial Park.
    Several representatives of the granite industry attended the funeral.
    Pallbearers were, Jack Williams, Dick Trembath, Robert Goetsch, Walter Maas, Harry Sturm and John Von Gnechten.