This refers to a “cast of precocious development of the genitals of a boy aged 4 years” and I can't imagine any 4-year-old boy sitting still for that.
Office 1330 New York Avenue,
Residence 507 E St. N.W.
April 23 1872
My Dear Dr
Please accept my sincere thanks!
I send with the Bandage &c. a plaster cast taken by Dr. Thos. Miller and Dr R.K. Stone of the genital organs in a child 4 years old.
Army Med. Mus.
1056 Sec IV [Anatomical Section]