Victor George Heiser, who was a preeminent public health physician, created a rich archive of material documenting all phases of his career, especially the international health work of the Rockefeller Foundation from 1915-1934. There are voluminous, detailed, and interesting diaries for the whole course of his adult life (1890-1972). There are notebooks reflecting on his early training and work (1890-1907), and lectures he attended at Jefferson Medical College in Philadelphia (1897).

Though the Miscellaneous Manuscripts collection is composed of items that do not fall readily into any other existing collection, the two dominant intellectual areas represented in the collection are Early American History and History of Science.