Collection consists of five loose black and white photographs and 2 albums of activities and employees of the Yeon Lumber Company; Margaret Mock and John Yeon at the Rose Festival; members of the Yeon family; and a train wreck.

Collection includes title abstracts, deeds, and contracts regarding property holdings and real estate transactions of John Mock and his son-in-law, John B. Yeon, Sr., particularly in connection with the Mock's Crest area of Portland, Oregon, and the Yeon Building at SW 5th Ave. and SW Alder St. in Portland, Oregon.