Legendary Crimean War Nurse and pioneer of modern nursing, FLORENCE NIGHTINGALE entirely handwritten envelope address panel, boldly signed "Florence Nightingale" in the lower left, and enclosed in PSA/DNA's proprietary sonically-sealed slab. Nightingale addresses the envelope to Mrs. Wilton Phipps - a member of the Red Cross. 
 
Dated 17.2.86 (February 17, 1886) Nightingale indicates the delivery as "Immediate" and addresses the envelope to Mrs. Wilton Phipps", and signs with a lovely full signature in the lower left.
 
CERTIFIED AUTHENTIC + FULLY ENCAPSULATED BY PSA/DNA Authentication Services EXPERT EXAMINATION. GUARANTEED GENUINE - simply one of the finest NIGHTINGALE autographs available on the market.
 
Nightingale's close friend and wealthy American Socialite, Mrs. Wilton Phipps remained active in the Red Cross serving on many important committees, including as Vice-Chairman of the Public Health Committee of the London City Council.
 
Envelope measures 4.25" x 5.5", with closed tear at upper left, and enclosed in a 10" x 6.5" slab. 
 
A handsome and impressive addition to the den or office of the Doctor, Nurse, history buff, medical or autograph collector. An exceptional investment opportunity, and a truly rare and remarkable find.
 
Sold as is, as shown.