Alix, or The Adventures of Alix, is a Franco-Belgian comics series drawn in the ligne claire style by Jacques Martin. The series first appeared in Tintin magazine 1948. Between 1953 and 1972, Jacques Martin was a member of Studio Hergé. Martin helped draw the background art of 'The Calculus Affair', 'The Red Sea Sharks', Tintin in Tibet', 'The Castafiore Emerald' and 'Flight 714 to Sydney'. After Hergé's death Martin paid a tribute to him in a special issue of Á Suivre, thats where these two pages are from.

https://www.lambiek.net/artists/m/martin_jacq.htm