Note 53 — Chapter II · ORIGIN AND LANDSCAPE (B) THE GROUP OF THE HIGHER CULTURES

Since the publication of the German original, Spinden’s further researches (Ancient Civilizations of Mexico) have placed the historical zero date at 613 B.C. (and the cosmological zero of back-reckoning at 3373 B.C.). This historical zero seems to lie deep in the pre-Cultural period, if later events have the dates given in the text. But compare Author’s note on p. 39.—Tr.