Barsoom: The Dying World

The Mars of Edgar Rice Burroughs, charted in the manner of a Victorian survey: the walled cities of Helium, Zodanga, and Thark linked by great canals across the dead sea bottoms, with the twin moons Thuria and Cluros recorded in the margin. Banths and thoats guard the corners of a map of a world that endures by its engineering alone.