OJ 5/30, [1a] Handwritten draft letter from Schenker to Preetorius, undated [February 12–13, 1931]

Schenker draws Preetorius's attention to part of Meisterwerk III, and invites him to consider his (Schenker's) theory of coherence in music as a basis for that in other arts, hence unity among the arts. -- He envisions a "club" of artists to discuss these matters.