"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 Förstemann's 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."