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In page Harry Seidler:

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Harry Seidler became a Canadian citizen when he was studying in the USA in late 1945. He travelled to Australia in 1948 on his Canadian passport (which he collected in mid-1946). By 1958, he had lived in Australia for ten years, and then sought to renew his Canadian passport but was unable to do so because he had been a naturalised Canadian who had not lived in Canada for more than three years).[1] He became an Australian citizen in late 1958 so he would have a passport to travel for work and his honeymoon. Harry Seidler married Penelope Evatt, daughter of Clive Evatt on 15 December 1958; they had two children.[citation needed]