Walthéry began his career in 1962 during studies at the Institut Saint-Luc in Liège, when he collaborated with scenario writer Mittéï to create his first comic, Pipo.[1] The following year, Walthéry started working for Peyo, assisting on The Smurfs, Johan et Pirlouit and Benoît Brisefer. Eventually he assumed creative responsibility of the series Jacky et Célestin, taking over from Will.[1]
He started his best known work series in 1967, working with a script by Gos to create Natacha.[2] Several years in the making, the series did not make its debut until 26 February 1970, in the Franco-Belgian comics magazine Spirou.[3]
Partial bibliography
Natacha
Natacha, hôtesse de l'air (written by Gos), Dupuis, 1971.
Natacha et le Maharadjah (written by Gos), Dupuis, 1972.
La mémoire de métal (written by Étienne Borgers), Dupuis, 1974. Also contains Un brin de panique (written by Marc Wasterlain)
Un Trône pour Natacha (written by Maurice Tillieux), Dupuis, 1975.
Double vol, (written by Mittéï and Walthéry, Dupuis), 1976. Also contains L'étoile du berger (written by Gos) and Un tour de passe-passe (written by Lemasque).
Le treizième apôtre (written by Maurice Tillieux), Dupuis, 1978.
L'hôtesse et Mona Lisa (written by Mittéï, additional art by Pierre Seron), Dupuis, 1979. Also contains Natacha et les petits miquets (written by Walthéry and Mittéï).
Instantanés pour Caltech (written by Étienne Borgers, additional art by Jidéhem), Dupuis, 1981.
Les machines incertaines (written by Étienne Borgers, additional art by Jidéhem), Dupuis, 1983.
L'ile d'outre-monde (written by Marc Wasterlain, additional art by Will), Dupuis, 1984.
Le grand pari (written by Mittéï, additional art by Laudec), Dupuis, 1985.
Les culottes de fer (written by Mittéï, additional art by Laudec), Dupuis, 1986.
Les nomades du ciel (written by Raoul Cauvin, additional art by Laudec), Dupuis, 1988.