Biographical Information: http://www.nlm.nih.gov/changingthefaceofmedicine/physicians/biography_36.html
Letters, 1850-1884: http://www.columbia.edu/cu/lweb/archival/collections/ldpd_4079307/
Elizabeth Blackwell Collection on New York Heritage Digital Archive: http://nyheritage.nnyln.net/cdm/search/collection/sunyup01/searchterm/elizabeth%20blackwell/field/relatig/mode/exact/conn/and/order/title/ad/asc
Writings: http://biodiversitylibrary.org/creator/706#/titles