Since the first edition of this pamphlet appeared in the year 1897, investigation in this department of science has made such marked progress, notwithstanding the slight amount of material, that a revision has now become desirable. It can be readily understood, that a new science, an investigation on virgin soil, such as the Maya study is, makes more rapid progress and develops more quickly than one pertaining to some old, much explored territory. In addition to numerous separate treatises, special mention should be made of Ernst FÖrstemanns commentaries on the three Maya manuscripts (Kommentar zur Mayahandschrift der KÖniglichen Öffentlichen Bibliothek zu Dresden, Dresden 1901, Kommentar zur Madrider Mayahandschrift, Danzig 1902, and Kommentar zur Pariser Mayahandschrift, Danzig 1903) which constitute a summary of the entire results of investigation in this field up to the present time.