Hebdo-Revue
From 1957 to 1968 several regional Quebec newspapers had use one common comic section entitled Hebdo-Revue, a formula adopted by the national newspaper in January 27, 1968 to replace his own and former comics section. As far as "Mandrake the Magician" is concerned, and before the cited adoption by "La Presse", it was published only by "Hebdo-Revue" from January 6, 1968.
Here are some of the reginonal newpapers which use the "Hebdo-Revue" comics section from time to time, so it is not sure that the short 1968 part is included for each of them : "L'Industrie" - Arvida "Le Drapeau" - Berthierville "La Voix de l'Est" - Granby "Le Laurentien" - Grand-mère "La Sentinelle" - La Tuque "Le Réveil" - Louiseville "Le Droit" - Ottawa (French newspaper from Ontario) "L'Écho du Nord" - Saint-Jérôme "Les Chutes" - Shawinigan" "La Tribune" - Sherbrooke "Le Nouvelliste" - Trois-Rivières "Les Cheneaux" - Trois-Rivières "Samedi-Dimanche"
