B. Hatt drew several covers and pages for L'Épatant in the 1910s. In the 1920s, he was present at Lili magazine. It is possible that this is Louis Forton, who also worked under the name Tom Hatt.
If anyone can tell us more about this artist, we would be very grateful. Send biographical details, strips published, comic links or scans to Lambiek by email.
