The 400th glyph has the same ordinal number (6-17) as the first glyph of the Mamari moon calendar:

Gb6-17 (400)	Gb6-18	Gb6-19	Gb6-20	Gb6-21	Gb6-22	Gb6-23	Gb6-24
Gb6-25	Gb6-26	Gb6-27	Gb6-28	Gb7-1	Gb7-2	Gb7-3	Gb7-4

Maybe the idea is to add 243 to 157 in order to reach 400. Number 243 we found at rau hei:

400 is understandable, but neither 243 nor 157 are very clear. We have tried to explain 243 as 9 * 27, but 157 is a prime number. Perhaps 157 = 156 + 1, where 156 = 12 * 13.

If so, then 243 could be regarded as 244 - 1, where 244 = 4 * 61. It takes 4 double-months to return. 244 looks like a later incarnation of 144 (= 12 * 12), because 244 = 144 + 100.

400 = 4 * 61 + 12 * 13 = 100 + 12 * 12 + 12 * 13 = 100 + 300.

The last quarter of 400, the dark quarter, comes after 12 * 25 light days. Sun has 12 months with 25 days in each.

Such a 25-day long month consists of two parts, 12 respectively 13 days long. The 13-day part should come as '1 more' part, also as '1 more than 12'.

Ordinal number 250 can suddenly be understood as 120 + 130. Let us try with G:

Ga5-9 is glyph number 250 - 130 = 120:

17
	Ga5-4	Ga5-5	Ga5-6	Ga5-7 (118)	Ga5-8	Ga5-9
18
	Ga5-10	Ga5-11	Ga5-12	Ga5-13	Ga5-14	Ga5-15	Ga5-16

The 17th henua period recalls -17 in 6-17, and 6, of course, should be the sun.

118 (= 4 * 29.5) exhibits the sun in form of vai at right, and the preceding Rei (with 5 * 6 = 30) 'kicks' the new season into action.

118 + 64 = 182, i.e. it is midsummer. 12 (excluding 0 as irrelevant) times 15 = 180. 13 * 15 = 195 days will come next.

Rogo will then be in the past (Ga5-10). 121 + 64 = 185.

43 + 1 glyphs later he appears again, and then with number 6 * 24 = 144:

	43		67
Ga5-10		Ga6-24
44		68
4 * 28 = 112

	98		76		183
Gb1-3		Gb3-15		Gb6-26
100			260
360

According to Rogo at Ga5-10 the limit for him comes with day 185, according to Rogo at Ga6-24 his limit comes with day 229, and then he must be 'recycled':

Midsummer seems to stretch for 45 days from Ga5-10 up to and including Ga6-24.

400 - 243 = 157. With 243 definitely located as the period from Ga6-25 to Gb6-26, there is room for 157 + 72 glyphs more in the text, which is equal to the number of glyphs on side a (229).

229 - 165 = 64 is equal to the number from Gb6-26 to the end of side b: