 Robert B. Harshe, founder, and later first president of California Society of Etchers, leaves the founding date ambiguous in his chapter in the 1916 book, "Art in California".His chapter mentions the four years of the society, although the chapter itself is undated.Mary Millman and Dave Bohn's very thorough biography of John W. Winkler, cited above, supports the CSE founding date of 1912.