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Credit
On the causes of idiocy : being the supplement to a report by Dr. S.G. Howe and the other commissioners appointed by the Governor of Massachusetts to inquire into the condition of the idiots of the Commonwealth, dated February 26, 1848 : with an appendix. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.