Hubert Lambert, who signs his work Hachel, is a graduate in illustration from the École Supérieure des Arts Saint-Luc in Liège. While still studying, he had his first gag pages published in Spirou, called 'Mésaventures sans Paroles', from 1965 to 1967. In 1967 he became the assistant of Mittéï, working on the artist's creations 'L'Indésirable Désiré' and 'Modeste et Pompon', both for Tintin magazine. He also assisted Edouard Aidans on 'Bob Binn', 'Tounga' and 'Les Franval'. It was in 1969 when he began his own gag series in Tintin, starring the temporary worker 'Benjamin'. The strip, with scripts by Michel Dusart, appeared in Tintin until 1980, and was collected in four black-and-white books. New book collections are published by Arcadiastrips since 2008.