James Thacher (February 14, 1754 – May 26, 1844)[1][2] was an American physician and writer, born in Barnstable, Massachusetts.
When Thacher was 16 he became an apprentice for Abner Hersey, a doctor from Barnstable, Massachusetts.
He was elected a Fellow of the American Academy of Arts and Sciences in 1803.
[4] He was married to Susannah Hayward of Bridgewater, Massachusetts.
Thacher was stationed at West Point in 1780 and supported the execution by George Washington of the British spy John André.