Norman Nienstedt Rupp was a timberland owner and investor. With his father, John J. Rupp, he bought, leased and sold timber lands in Florida, Louisiana, Michigan, Minnesota, Oregon, Washington, Idaho, and California. Rupp moved from Saginaw, Michigan to Portland, Oregon. He was associated with the Huron Timber Company, the Mitchell, Dorr Real Estate Company, the Rupp Investment Company, and the Rose Gold Mining and Milling Company. The collection includes the diaries of John J. Rupp, 1875-1927, letters, books, journals and ledgers and other business papers.