Combat in 1947, de Dadelsen became London correspondent of the paper, Franc-Tireur, a post he filled 1948-1949. He had a son, Michel, by Elizabeth-Ann Heffernan (de Dadelsen), an actor. Between 1946 and 1951 de Dadelsen presented, from London, a weekly current affairs programme, “Les Propos du Vendredi”, for the BBC French Section. He was an editor for both the BBC French and German services until 1956. In 1951 he moved to Geneva where he focused his career on Europe. He collaborated with Denis de Rougemont at the European Cultural Centre and became adviser to Jean Monnet and his European Coal and Steel Community in Luxembourg. In 1956 he became deputy director of the International Press Institute in Zurich. Jean-Paul de Dadelsen died in Zurich in June 1957 from a brain tumour. Poetic output Not until the late age of 39, during his first stay in Switzerland, did de Dadelsen compose his first long poem, “Bach en automne” (1952-1953), that Camus published in 1955 in the Nouvelle Revue Française. In 1956 his “L'invocation luminaire de Jonas” and other poems appeared in the Cahiers des Saisons and in 1957, “La dernière nuit de la pharmacienne” and other poems were published in Preuves. A first collection, consisting of the unfinished series, “Jonas”, was published by Gallimard in 1962 by François Duchêne, a colleague and friend of Jean Monnet. In the preface Henri Thomas said of the poet: "He follows no one; he corresponds to nothing else in our Literature, neither dissidents nor rhetoricians will make their accounts with him. We always run the risk of forgetting that poetic genius flicks its thumb at our conformities.” One of the sources of poetic inspiration for de Dadelsen, born in a practicing Lutheran family, was the Bible (see “Jonas”, “Bach en automne”, “La femme de Loth”). Alsace and the landscapes of his childhood, the Ried and the Sundgau moulded his poetic sensibilities and inform his output (“Jonas”, “Bach en automne”, "Goethe en Alsace", "Cinq étapes d’un poème"). He translated the Alsatian poems of Nathan Katz into French. As a German scholar he pays homage to Goethe and to Friedrich Schlegel. His scripts for the BBC broadcasts on the theme of war (“Ombre”) and on Europe (“Strasbourg”, “acte de naissance”, “Y a-t-il une Europe?”, “La vocation de l’Angleterre”), just as his poem, “Les Ponts de Budapest”, on the Hungarian Revolution of 1956 against oppression by the USSR,