Soon afterwards he met Georges Remi (aka Hergé) with whom he collaborated on several albums of The Adventures of Tintin (and more specifically on Tintin in Tibet and The Red Sea Sharks) while working on his own albums.
Pian sen jälkeen hän tapasi Georges Remin (Hergé), jota hän avusti monessa Tintti-albumissa (varsinkin Tintti Tiibetissä ja Seikkailu punaisella merellä).