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Books about Surlet:
De Installatie Van Den Belgischen Regent Erasmus Ii (erasmus Baron Surlet De Chokier): Ironisch-komische Episode... by Erasme Surlet de Chokier (Oct 5, 2011)
Constitution (staatsverfassung) Von Belgien: Errichtet Vom National Congress, Beschworen Von Dem Regenten Surlet... by Belgique (Mar 15, 2012)
Wiki information Surlet:
Erasme Louis, Baron Surlet de Chokier, born in Liège, was a Belgian politician and before the accession of Leopold I to the Belgian throne, was the first Regent of Belgium.