John Jeffries John Jeffries John Jeffries (5 February 1745 – 16 September 1819) was a Boston physician, scientist, and a military surgeon with the British Army in Nova Scotia and New York during the American Revolution. He is best known for accompanying Jean-Pierre Blanchard on his 1785 balloon flight across the English Channel. Born in Boston, Jeffries graduated from Harvard College and obtained his medical degree at the University of Aberdeen. Dr. Jeffries played a large role in the trial for the Boston Massacre as a witness for the defense. He was the surgeon for Patrick Carr, who was one of the
Jean-Pierre Blanchard as Sophie Blanchard) in 1804. On 20 February 1808 Blanchard had a heart attack while in his balloon at the Hague. He fell from his balloon and died roughly a year later (7 March 1809) from his severe injuries. His widow continued to support herself with ballooning demonstrations until it also killed her. Jean-Pierre Blanchard Jean-Pierre [François] Blanchard (4 July 1753 – 7 March 1809) was a French inventor, best known as a pioneer in balloon flight. Blanchard made his first successful balloon flight in Paris on 2 March 1784, in a hydrogen gas balloon launched from the Champ de