This is a picture of Alan Turing. He was a British maths prodigy. He was one of the head people in cracking Enigma. This is a primary source as it is a photo of Alan Turing before he went to work on cracking Enigma which turned into making "Christopher" or its also known as the Bombe machine.. With Alan making the Bombe machine it shortened the war by a few years and it is estimated that he save millions of live, including Canadian lives.
Stanisław Ignacy Witkiewicz, commonly known as "Witkacy", was a Polish poet, playwright, novelist, painter, photographer and philosopher. After hearing the news of the Soviet invasion of Poland on 17 September 1939, Witkacy committed suicide on 18 September by taking a drug overdose and trying to slit his wrists. He convinced his young lover Czesława to attempt suicide with him by consuming Luminal, but she survived. Source: Wikipedia.