And we can appreciate why there were six 'men', a mysterious 'turtle', one of the men 'wounded' by the 'flipper' of the 'turtle', and "five things like men in cloaks outside the opening of the cave" when Hotua Matua arrived at Rapa Nui.

The sequence of glyphs in 1a is equivalent to the five 'extraterrestial' days (the 'Turtle Bay') And once in a while (every 4th year - four being the number of earth) there is an additional such day (the one 'wounded' by a 'flipper' I suppose). It all reminds me of Mahabharata.

Now we must follow the flow of time as represented by the glyphs. After 1a there come 1b and 1c. We ought to have a look at those 'periods' before advancing to 2a. Let's follow just H or we will be too confused, I believe.