Source: fighting-man-of-mars.txt (PG #70691). Seventh Barsoom novel (1931).
Assumption: Content may encode redacted fact. Challenge claims of invention.
Hadron of Hastor; rescue narrative; Jahar. Extends Barsoom geography and political intrigue. Per mars-fiction-survey: Hadron as protagonist; standard Barsoom tech (thoats, radium, airships).
Seventh novel in sequence. By 1931 Burroughs had established: dead seas, canals, Atmosphere Factory, polar forbidden zones (south: Valley Dor/Therns/First Born; north: Okar/Yellow Men), Kaldane/Rykor, telepathy. Fighting Man builds on prior encoding. Any novel elements (Jahar, etc.) merit same challenge: invented or second-hand?