Medtner - Piano Concerto 3 Analysis (Tozer)

First, I need to tout how amazing the Interludium is: Transforming the lyrical Theme A1 into an aggressive march is striking enough, but then Medtner puts it in 2/2 time, C major, and not just in canon with itself but also in counterpoint with a new theme (E1) that is both in a different rhytm (3/4) and a different key (A minor). Later, we see how A1’s continuation (A2, 16:12) is made into a regular part of E1 (really obvious if you listen to the timestamps in the score). But because the beginning of E1 is