Born in Sidcup, Kent on 13 August 1899, Wiskemann studied history at Newnham College, Cambridge before beginning a successful career as a journalist.
From 1930, she worked in Berlin for the ‘New Statesman’ and other publications, and was among the first to warn of the dangers of Nazism.
So effective were her articles in alerting international readers to the true nature of Hitler’s regime that she was expelled from Germany by the Gestapo in 1937.
She continued to expose Nazi plans for German expansion in her influential books ‘Czechs and Germans’ (1938) and ‘Undeclared War’ (1939).