Data retrieved from NooSFere, BDFI, internationalhero and Russkaya Fantastika. {{FantLab-title|251923}} states : "July-September 1909", which might have to be corrected as "July-September 1908".
This serial was published in book-form in 1910 (Félix Juven), then split into two volumes in 1921 : L'homme qui peut vivre dans l'eau and Les amours de l'inconnu) (Joseph Ferenczi & fils).