Let us begin at Ab2-41: 

Ab2-29 Ab2-30 Ab2-31 Ab2-32 Ab2-33 Ab2-34
96 97 98
Ab2-35 Ab2-36 Ab2-37 Ab2-38 Ab2-39 Ab2-40
99 100 0
398
Ab2-41 Ab2-42 (124) Ab7-27 Ab7-28 (524) Ab7-29 Ab7-30
1 199 0 1

99 at hahe in Ab2-36 followed by manu kake in Ab2-37 means a new season is beginning with Ab2-37. 199 between Ab2-42 and Ab7-27 is about twice 99, which suggests there could be two 'seasons' in the interval from Ab2-41 to Ab7-27.

Indeed this idea is supported by the glyphs:

194
Ab2-41 Ab2-42 (124) Ab4-75 Ab4-76 (320)
1 97 99
Ab4-77 Ab4-78 Ab4-79 Ab4-80 (324)
100 0

Metoro said vero at Ab4-76 and 320 presumably is to be understood as a sign of the end of the lifegiving sun season. The tagata glyphs are 200 glyphs apart. The great rising fish in Ab4-75 seems to be 'killed by the spear' -  he is at left in the pair of glyphs which could represent day 99 beyond high summer. 4 * 75 = 300.

Ab4-80 - where 4 * 80 possibly alludes to glyph number 320 - is the last glyph in line b4. Then comes a new season. With the beginning of glyph line Ab5 the subject naturally should be 'fire' (rima = 5). There are 5 + 5 feathers on hua and 5 feathers on ragi:

Ab5-1 (325) Ab5-2 Ab5-3 Ab5-4
Ab5-5 Ab5-6 Ab5-7 Ab5-8
Ab5-9 Ab5-10 Ab5-11 Ab5-12

This period exhibits the same type of structure:

194
Ab5-1 Ab5-2 Ab7-25 Ab7-26 (522)
1 97 99
Ab7-27 Ab7-28 Ab7-29 Ab7-30 (526)
100 0

A new symmetry emerges: The glyphs at 99 are keys for understanding what season is ending, while the 4 following glyphs in a way inaugurate the next season.