Royer (Raoul Debroeyer, °1933) is a Belgian cartoonist with an impressive range of humor and imagination. On the internet there is very little to find about him. "La Femme" (Edit. Paul Legrain, Brussels, 1991) is the only book from him I own. There exists an anthology of his work "20 ans de dessins" (Edit. Luc Piré, 1999).
Royer (Raoul Debroeyer) on Wikipedia
Royer on Press Cartoon Belgium