Compiled by J. G. Jack, primarily during his tenure at the Arnold arboretum, this collection consists of biographical information and correspondence, as well as publications, images, and research notes. J. G. Jack worked as a lecturer at the Arnold Arboretum and was the first staff member, after Sargent, to visit Asia. The collection covers the time period from 1887-1949, with most materials coming from the 1930’s.