The Kerckhoff-Cuzner Mill & Lumber Company was originally the Los Angeles branch of the J.G. Jackson Lumber Company. James Cuzner was managing it when in 1879 William George Kerckhoff (1856-1929) approached him about purchasing a partner stake in the company. Cuzner and Kerckhoff each purchased a quarter stake and the company then became Jackson, Kerckhoff & Cuzner. In 1883 the company incorporated and became the Kerckhoff-Cuzner Mill & Lumber Company. As business grew they acquired branch yards in Pasadena, Pomona, Lamanda Park, San Fernando, Hollywood, Brawley, Calexico, Imperial, and also purchased Boschke's Island or Smith's Island, as it was also know, in San Pedro and established a wholesale mill and lumber yard there.
From the description of Records of Kerckhoff-Cuzner Mill & Lumber Company, 1883-1933 (bulk 1883-1908). (Huntington Library, Art Collections & Botanical Gardens). WorldCat record id: 122560029