After spending a few years studying and mountain climbing in Europe, Wynn returned to Indianapolis to set up his professional practice, giving emphasis to internal medicine, diagnosis, and pathology.

Dr. David Walters further stated that, "Since that time his activities were so varied and of such value that no history of Indiana, covering the period from 1900 to the date of his death, can be fully and truthfully written without frequent mention of them.

"[5] Wynn was selected as the first city sanitarian of Indianapolis and became identified with the Department of Pathology of the Medical College of Indiana.

[4][6] At the Ohio Asylum, Wynn came under the tutelage of Dr. Josiah Rogers and Dr. Sam Smith, distinguished neuropsychiatrists who would later head the American Psychiatric Association.

Goddard was a specialist in mental conditions and is credited with coining the term "moron" to describe a level of feeble-mindedness, or an IQ score between 50 and 69.

A copy of one of the Einstein letters to Goddard is in the Archives of the History of American Psychology at the University of Akron, Ohio.

Wynn conceived and proposed the idea of creating a state park in Indiana on site of the log cabin farm where Abraham Lincoln spent most of his boyhood years.