Beryl Markham (nee Clutterbuck, 26 October 1902 3 August 1986) was a British-born Kenyan aviator (one of the first bush pilots), adventurer, racehorse trainer and author. She was the first woman to fly solo across the Atlantic from east to west. She wrote about her adventures in her memoir, "West with the Night".

Based on that paragraph can we conclude that this sentence is true?
Beryl Markham wrote "West with the Night" when she was 86 years old.
No