The history of Carl Hilmar Guenther and the founding of Pioneer Flour Mills from 1851 to the 150th Anniversary in 2001. This book places the company in the broad framework of evolution from waterwheels to computers and from milling just plain flour, including C. H. Guenther’s Pioneer and White Wings brands. C. H. Guenther & Son is the oldest continuously-operated family-owned milling company in the United States.