total of some 6,000 inscriptions. In Bohemia and Poland, chronograms in epitaphs occur more frequently, and are often very clever; for example, the epitaph of the physician Menahem b. Asher Mazzerato, who died at Prague in 1680, reads as follows: איש צדיק ישר חכם וענו האלוף מהר״ר מנחם רופא מומחה (Lieben, "Gal 'Ed," p. 36); and the numerical value of the marked initial letters therein amounts to 440; i.e., 5440, the Jewish year in which Menahem died. The year of death of the associate rabbi of Prague, Zalman, who perished in the great fire of 1689 (=5449 Jewish era), is indicated by the words 'באש יצא מאת ד (bolded letters equal 448) (ib. No. 59). In books While the epitaphs, in addition to the chronograms, in many cases directly mention the dates, many manuscripts, and an even greater number of printed books, are dated simply by means of chronograms; authors, copyists, and typographers rivaling one another in hiding the dates in intricate chronograms, most difficult to decipher. Hence, many data of Jewish bibliography still remain to be determined, or at least rectified. Down to recent times the custom of indicating dates by means of chronograms was so prevalent in Jewish literature that all but few books are dated by numerals only. In the earliest printed books the chronograms consist of one or two words only: the Soncino edition of the Talmud, for instance, has for its date the earliest printed chronogram, גמרא ("Gemara") = 244 (1484 C.E.). Words like רננו ("rejoice ye!"), שמחה ("joy"), ברנה ("with rejoicing") were especially used for this purpose, as they express happiness. Later on, entire verses of the Bible, or sentences from other books, having some reference to the contents or title of the book, or to the name of the author, publisher, printer, etc., were used. In longer sentences, in which some of the letters were not utilized in the chronogram, those that counted were marked by dots, lines, or different type, or were distinguished in other ways. Innumerable errors have been made by bibliographers because the distinguishing marks were missing or blotted, or had been omitted. To this source of confusion must be added the varying methods of indicating the "thousand" of the Jewish era. The Italian, Oriental, and earlier Amsterdam editions frequently designate the thousand as ( = , "the major era"). The German and Polish editions omit the thousand, considering only