Scope and Contents: The collection is mostly photocopies of materials that were transferred to the Arnold Arboretum in 2000. That material primarily consists of field notes for various botanical collections made by Rock. It also contains additional documents pertaining to his collections. There are handwritten notes made for his 1925-1927 collections, when he was collecting in China for the Arnold Arboretum. It also includes maps from his 1926 collecting trip.There is one original manuscript in the...