the skill and efforts of editors Rimsky-Korsakov and Glazunov, the opera is still episodic and dramatically static, a problem of which the composer himself was aware when he embarked on composition (see quote above in "Composition History"). This is partly a consequence of Borodin's failure to complete a libretto before beginning composition of the music—the same problem that plagued his colleague Mussorgsky in the composition of Khovanshchina. Both composers wrote their librettos piece by piece while composing the music, both lost sight of the overall narrative thread of their operas, and both wound up with pages and pages of music that needed to be sacrificed to assemble a cohesive whole. Also, both died before finishing their operas, leaving the task of completion, editing, and orchestration in both cases to Rimsky-Korsakov. Performance practice One of the main considerations when performing Prince Igor is the question of whether to include Act 3, much of which was composed by Glazunov. The practice of omitting it was mentioned as early as 1909 in Rimsky-Korsakov's memoirs. Many productions leave Act 3 out because it "fails to carry conviction both musically and dramatically." On the other hand, maintaining the act has certain benefits. It contains some fine pages (e.g., the "Polovtsian March"), provides an important link in the narrative (Igor's escape, Vladimir's fate), and is the origin of some of the memorable themes first heard in the overture (the trio, brass fanfares). Fortunately, the option of omitting the fine overture, also known to have been composed by Glazunov, is seldom considered. Recently, the question of the best sequence of scenes in which to perform the opera has gained some prominence. Borodin did not complete a libretto before composing the music to Prince Igor. The opera has traditionally been performed in the edition made by Rimsky-Korsakov and Glazunov. It will be obvious that the positions to which they assigned the Prologue, Act 3, and Act 4 cannot be changed if the story is to make sense. However, because the events of Act 1 and Act 2 overlap and are independent of one another, Act 2 may just as well precede Act 1 without any loss of coherence. Soviet musicologists Pavel Lamm and Arnold Sokhor reported the existence of a written plan (now in Glinka's Musical Culture Museum, Moscow), in Borodin's hand, that specified this sequence of scenes: The omen from heaven (Prologue) Imprisonment (Act 2) Galitsky's court