Chanson d'avril, Natacha's 23rd album by François Walthéry, begins prepublication in Spirou 4534, March 5, 2025. After L'épervier bleu and Sur les traces de l'épervier bleu, it is the final installment in a trilogy adapting two adventures of L'Epervier Bleu by Sirius originally published in Spirou in 1948/1949, L'île aux perles and Les pirates de la stratosphère.

As luck would have it I am reading this issue of Spirou in the Old Family House, where I found as a teen the bound collection of Spirou from 1949 that featured the end of Lîle aux perles and the beginning of Les pirates de la stratosphère, the two very comics that Walthéry decided to adapt.