The present paper consists of the first edition, translation and commentary of
a Manichaean Sogdian bifolio, whose photos are preserved in the Nachlass of Academician
Carl H. Salemann at the Institute of Oriental Manuscripts, RAS (St. Petersburg).
The present location of the bifolio is unknown. One joining fragment has been found in
the Berlin Turfan collection during the preliminary work on this edition. Two relatively
long portions of Manichaean didactic treatises are extant and do not correspond to any
known text. The first (I) is a Lehrtext on the duties of Manichaean monks living in a
monastery. The second (II) contains the fourth and part of a fifth question, followed by
answers, of a catechetical text concerning the fate of the body and of the soul after death.