Extant historical scholarship in the Jungian literature and the Alcoholics Anonymous (AA) literature does not provide a complete picture of the treatment of Rowland Hazard by C. G. Jung, an analysis that AA co-founder Bill Wilson claimed was integral to the foundation of AA in theory and practice. Wilson's original report resulted in archivists and historians incorrectly calibrating their searches to the wrong date. The current work definitively solves the mystery of the timing of Hazard's treatment with Jung by placing his preliminary analysis with Jung in the year 1926, rather than 1930 or 1931. Previously unexamined correspondence originating from Jung, Hazard, his cousin Leonard Bacon, his uncle Irving Fisher, and his aunt Margaret Hazard Fisher is supplemented by relevant primary and secondary source material.