This is the publication of a brief unknown text of one page, written by Paul Maas in October 1935, in which the very first definition and analysis of ‘separative’ and ‘conjunctive errors’ are given. What we have before us is in fact the germ of the seminal essay Leitfehler und stemmatische Typen which Maas published two years later in the “Byzantinische Zeitschrift”.
