Chapters 18-23 in autograph draft. Most chapters have, in several places, interleaved numbered sheets which are usually smaller in size than the main sequence of numbered sheets and are designated (by the author) by a main sheet number followed by a letter, e.g. '303A' (and variants thereof).
Chapter 18. Numbered: 292-303, 303A, 304-9.
Chapter 19. Numbered: 310, [310A-C], 311-17, 320-30, 330A-B.
Chapter 20. Numbered: 331-5, 335A-B, 336-43, 343A, 344, 344A, 345, 345A, 346-51, [352A-B], 352-4.
Chapter 21. Numbered: 355-75.
Chapter 22. Numbered: 376-82, 382A, 383-418, [418A], 419-23, 423A-B, 424.
Chapter 23. Numbered: 425-33, 433A, 434-48, 449A-[B], 449-53, 458, 453 (second sheet with this number), 454-7, 452 (second sheet with this number), 454-7 (second sheets with these numbers), 459-86.