The

In the search for Thunder Twins (cfr the excursion at maitaki) a 300-day long calendar was discovered by counting from Gb8-16, the first glyph after winter solstice:

		148			148
Gb8-15	Gb8-16 (1)	148	Ga5-25 (150)	Ga5-26	148	Gb2-30 (300)

This way of counting also resulted in identifying glyph number 168 (8-16 reshuffled) as henua in Ga6-13 (where 6 * 13 = 3 * 26). The preceding tamaiti (Ga6-12), the following manu kapa, the parallel ua in K, and other factors, made it probable that the twin glyphs Ga6-9--10 could be the searched for thunder twins:

23
23	Ga6-9	Ga6-10	Ga6-11
24
24	Ga6-12	Ga6-13 (168)	Ga6-14	Ga6-15	Ga6-16
25
25	Ga6-17	Ga6-18

These 10 glyphs end with Ga6-18 (where 6 * 18 = 9 * 12). Period 22, with 4 glyphs, extends the number of glyphs (days) in the group to 14.