Gertrude Ederle entering the water on August 6, 1926 at Cap Gris-Nez, France on her way to becoming the first woman to swim the English Channel (her time was 14 hours 31 minutes)

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It looks like she has something smeared all over her. What is it? Sunblock?

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Gertrude Ederle
Swimmer

Gertrude Caroline Ederle was an American competition swimmer, Olympic champion, and former world record-holder in five events. On 6 August 1926, she became the first woman to swim across the English Channel. Wikipedia
Born: October 23, 1905, New York City, New York, United States
Died: November 30, 2003, Wyckoff, New Jersey, United States
Height: 1.68 m
Buried: Woodlawn Cemetery, New York City, New York, United States
Olympic medals: Swimming at the 1924 Summer Olympics – Women’s 4 × 100 metre freestyle relay, MORE
Parents: Henry Ederle, Gertrude Anna Haberstroh