[1] Before the First World War one of his clients was the Russian Marxist revolutionary Anatoly Lunacharsky.
[1] However, following the rise of Adolf Hitler, Eyck emigrated to Britain in 1937, living in Boars Hill, Berkshire and Hampstead, London.
[1] Karina Urbach has written that as "a lawyer, Eyck despised Bismarck's lack of respect for the rule of law, and as a liberal he passionately condemned Bismarck's cynicism towards liberal, democratic, and humanitarian ideals".
[5] Gerhard Ritter wrote to Eyck, lamenting that his work would confirm the negative impression people abroad had of German history.
[5] Eyck enjoyed a friendship with Theodor Heuss, the first President of postwar Germany.