Empires of Barsoom

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The Cyclopaedias

Each of the volumes presented here will follow a general format. They are organized and named according to the approximate region of Mars wherein lie the cities and empires described. This is not (necessarily) intended to force a paradigm of juxtaposition; it's just for ease of reference, since ERB only named a few regions of Barsoom.

The Introduction of each page contains a brief descriptin of the Martian land features to be found in the region, followed by a description of any Barsoomian features. Following the Introduction will be writeups covering each of the major kingdoms located in the region covered, including places of interest in each. Finally, new Archetypes specific to the area are described at the end.

The reason for providing two sets of descriptions is simple. Some gamers may wish to play in a more "Martian" game, and some gamemasters may want to take advantage of the unique adventuring settings that the real-world Mars has to offer. Others may want to game in a strictly "Barsoomian" environment. This gives you the opportunity to do either.

Conflicting Data: Thark and Warhoon

Those familiar with the excellent maps of Barsoom produced by John Flint Roy and published in his Guide to Barsoom will note a few discrepancies between his plots and mine, most notably in the southeastern hemisphere. The locations of many of the cities are rather vague, especially Thark, Warhoon, Kobol and the Atmosphere Factory. However, several passages from the canon provide enough information to glean a general impression of their locations:

"They [the Tharks] roamed an enormous tract of arid and semi-arid land between forty and eighty degrees south latitude, and bounded on the east and west by two large fertile tracts. Their headquarters lay in the southwest corner of this district, near the crossing of two of the so-called Martian canals." (PoM, 7)

While plotting the escape from Thark, Dejah Thoris draws for John Carter a map of the region between Helium and Thark:

"It was crisscrossed in every direction with long straight lines, sometimes running parallel and sometimes converging toward some great circle. The lines, she said, were waterways; the circles, cities; and one far to the northwest of us she pointed out as Helium. There were other cities closer, but she said she feared to enter many of them, as they were not all friendly toward Helium." (PoM, 16)

The location of Thark is further defined in this passage:

"'The great waterway which leads to Helium is but fifty miles to the south,' murmured Sola, half to herself; 'a swift thoat might make it in three hours; and then to Helium it is five hundred miles, most of the way through thinly settled districts.'" (PoM, 16)

The location of Helium and Zodanga are described in greater detail in Swords of Mars, which states that Zodanga lies at 30 degrees South by 172 degrees East, "over nineteen hundred miles east of the Twin Cities of Helium." This would place Helium at approximately 112 degrees East.

If the previous passages are to be believed, and we assume that Captain Carter used earthly measurements when he said "miles" (no mis-translation), then this would place Thark at approximately the location that I and nearly every other amateur cartographer have plotted, somewhere to the south of and between the cities of Zodanga and Helium.

John Flint Roy's maps, however, place Thark and Warhoon further to the west of both cities than is readily apparent from the text. He claims to have had access to the working maps made by Edgar Rice Burroughs, however, so his research is very likely the more accurate. (One possible explanation for the third passage above is that Sola meant it was five hundred miles to the borders of the Heliumetic empire, which would account for the discrepancy between the apparent location of Thark and JFR's plotted location.)

To see a copy of J.F. Roy's maps, visit the ERBAtlas website. It's worth the visit. His book, A Guide to Barsoom, is no longer in print, but is well known in the community. Try a search of ABEBooks to find it.

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