Daxo. Daxo was created by Henri Rainaldy and appeared in the Moroccan Daxo (1934). Daxo is a Superhuman. In the future of 1957 the entire French government, including the military high command, mysteriously disappears. Responsible for the act is the Moroccan musical composer and psychic Daxo, who is in thrall to a mysterious Femme Fatale. Daxo is Watsoned by his b.f.f. Doctor Morange.
Daxo is an interesting case, the first (that I’ve been able to find) science fiction novel by a pied-noir (French colonist in the French colonies in North Africa). There was a great deal of proto-science fiction in the Arab world, but Arabic science fiction didn’t really begin until the 1960s, nor did the pieds-noirs write any genre fiction (again, that I’ve been able to find). Which would make Daxo an intriguing anomaly–except that Rainaldy, a journalist, not only had the tradition of French science fiction to draw upon (by 1934, a healthy, flourishing tradition–see here for more on that), but the tradition of dime novels in the Arab world. Many of these dime novels were translations of European and American dime novels, such as the Nick Carter series, and some of those had substantial science fictional elements or were outright science fiction.
All of which is to say that I suspect Daxo is not an outlier or a chronological precursor to Arabic science fiction, but a shining example of it from its first, diffuse phase, one which undoubtedly began with Jules Verne, as so much else did. What we in the Anglophone world need are French and more importantly Algerian, Moroccan, and Tunisian popular culture scholars to investigate this further, and read the materials that we in the Anglophone world don’t have access to. I suspect a perusal of Algeria, Moroccan, and Tunisian newspaper and dime novels will turn up wonders and will rewrite the history of science fiction in the Arab world.