4. We should remember from Achird the possibility of a connection between this star and Regulus:

... The first star with a low right ascension, which I can find in the alphabetical order given in my book, is Achird, and I include some possibly relevant glyphs for comparison and also some comments from Allen:

Achird η Cassiopejae 3.46 57º 33' N 00h 46m 11.7 419.7
Gb6-26 Gb6-27 Gb6-28 Gb7-1 Gb7-2 Gb7-3 Gb7-4
Gb7-5 Gb7-6 Gb7-7 Gb7-8 (*11) Gb7-9 (420) Gb7-10 Gb7-11
Gb7-12 Gb7-13 Gb7-14 (425) Gb7-15 Gb7-16 Gb7-17 (*20)

... Allen does not mention Achird and he has no other name for η Cassiopejae, but I guess the star could be connected with α Leonis, Regulus, once named Achir (Possessing Luminous Rays):

'Naturally sharing the character of its constellation as the Domicilium Solia, in Euphratean astronomy it was Gus-ba-ra, the Flame, or the Red Fire, of the House of the East; in Khorasmia, Achir, Possessing Luminous Rays; and throughout classical days the supposed cause of the summer's heat, a reputation that it shared with the Dog-star.'

There are 5 flames at the top in Gb7-8, a pu glyph without holes - holes which are 'plugged' ('hilled up', puo). The distance to Regulus at right ascension 10h 06m (= day 153.7) is 141 days. From Gb7-8 to the end of side b there are 54 glyphs and glyph number 141 - 54 = 87 is Ga4-3:

52 84
Gb7-8 (*11) Gb7-9 (420) Ga4-1 Ga4-2 Ga4-3 (87) Ga4-4
Achird (?) 140
Ga4-5 (*153) Ga4-6 (90)
Achir (?)

Spring equinox south of the equator is day number 87 counted from winter solstice and possibly henua in Ga4-3 marks this cardinal point.

Regulus could very well be represented by Ga4-5--6. The 'takaure' season (winter) evidently (according to our earlier investigations) ends with Ga4-2.

Winter could then be described not as season of dry vegetation ('straw') but as a season with dry insects ('souls of the unborn'):

... From a religious point of view, the high regard for flies, whose increase or reduction causes a similar increase or reduction in the size of the human population, is interesting, even more so because swarms of flies are often a real nuisance on Easter Island, something most visitors have commented on in vivid language. The explanation seems to be that there is a parallel relationship between flies and human souls, in this case, the souls of the unborn. There is a widespread belief throughout Polynesia that insects are the embodiment of numinous beings, such as gods or the spirits of the dead, and this concept extends into Southeast Asia, where insects are seen as the embodiment of the soul ...

The 5 flames of fire in Gb7-8 could visualize how Sun no longer is going in and out each day, how his holes of entrance and exit are blocked, and how Sun is behind the world mountain, north of the equator.

I have above suggested a plausible (but not proven) correlation between the star η Cassiopejae and this time of the year. At any rate I think we can eliminate the question marks at the names Achird and Achir - the pair of glyphs Gb7-8--9 are presumably connected with the pair of glyphs Ga4-5--6.

We must correct the given distance 141 days from Achir to Regulus. It is 153.7 - 11.7 = 142.0 days. No fraction is needed to express the distance which is a further argument for an imagined connection between η Cassiopejae and Regulus.

Then, by considering a possible structure which has 4 days at its beginning we could speculate in a reorder from Raaraa up to and including the northern eyebrow of the Lion (also with no fraction in its distance to Regulus):

52 84
Gb7-6 Gb7-7 (418) Gb7-8 Gb7-9 Ga4-1 Ga4-2 (*150)
Raaraa     Achird (11.7)   Ras Elaset Borealis (149.7)
142

At Ga4-2 a season with half 300 days could be ending (64 + 86 = 150). The eyes of the Lion are not yet open and this season could therefore represent a final section of 'winter in heaven'.

Raaraa in Gb7-6 should not mark winter solstice on Easter Island, because spring equinox should be 87 - 61.7 = ca 25 days beyond Regulus:

South of the equator North of the equator
autumn equinox 266 spring equinox 80 (89)
Achird 266 + 11.7 = 277.7 Achird 89 + 11.7 = 100.7
winter solstice 358 = 266 +172 - 80 summer solstice 172 (181)
Sun returns (Naos) 23 (122) = 87 - 64 Sun leaves (Naos) 202 (211)
Achir (Regulus) 266 + 153.7 - 358 = 61.7 Achir (Regulus) 89 + 153.7 = 242.7
spring equinox 87 = 358 + (266 - 172) - 365 autumn equinox 266 (275)
summer solstice 177 = 87 + (356 - 266) winter solstice 356 (365)
Sun leaves (Altair) 202 (301) = 23 + 179 Sun returns (Altair) 16 (25)

If Achird should be at 11.0, then it would be 277 (respectively 100 days) beyond winter solstice. And then Regulus would be at day number 61 (respectively 242) beyond winter solstice. The distance between Achird and Regulus is not 277 - 61 = 216 days but 153.7 - 11.7 = 142 days, and from Regulus to Achird it is 365 - 142 = 223 days.
21
Ga4-3 (87) Ga4-4 Ga4-5 (**61) Ga4-6 (*154)
    Regulus (153.7 - 92 = 61.7)
Ga5-1 (112) Ga5-2 Ga5-3 Ga5-4 (**87) Ga5-5 (*180)
      spring equinox (179 - 92 = 87)  

From autumn equinox to winter solstice on Easter Island there are 358 - 266 = 92 days.

But his interpretation disagrees with our earlier solution with viri in Ga5-11 marking spring equinox (cfr at Camp 9):

Ga5-6 Ga5-7 Ga5-8 Ga5-9
Ga5-10 Ga5-11 (122) Ga5-12 Ga5-13 Ga5-14 Ga5-15 Ga5-16
  spring equinox (?)          

At viri in Ga5-11 we can count 64 + 122 = 186 which is the number of days from spring equinox (89) to autumn equinox (275) north of the equator. Therefore Ga5-11 ought to be at spring equinox south of the equator.

However, counting from Gb8-30 glyph number 89 will correspond to the location of Regulus. Leo is a very ancient constellation and once Regulus must have marked spring equinox north of the equator.