00:00 First statement of the subject. Fig. 1
00:17 Second part enters (answer), the first part continues with the countersubject. Fig. 2
00:36 Brief extension before the next part enters. Fig. x
00:41 Third part enters (subject), the second part moves on to the countersubject and the first part continues with free material.
00:58 Final part in the bass pedals enters (answer).
01:15 Episode. Fig. 3
01:25 The subject enters in the midrange. Fig. x
01:32 The bass notes lead into a pedal point.
01:35 Pedal point begins in the bass as the other parts develop the subject.
01:45 Bass moves out of the pedal point.
01:52 Modified statement of the subject, bass voice drops out.
02:20 Dramatic entrance of the lower voice, same modified statement of the subject.
02:27 Trill in the upper part acts as a short ostinato.
02:36 Slow notes in the bass define the harmonic flow while the upper parts become imitative, episode.
02:52 A very thick texture develops 
03:11 Another imitative section, thinner in texture.
03:19 Modulation to related key areas.
03:39 Bass entrance with the subject.
03:54 Final cadence. Fig. x
04:04 End.