I hesitate somewhat to use number arguments, yet sooner or later it must be done. Counting glyphs from the specially designed vaha mea (in Aa6-67) to the exceptional hoea (in Ab4-69) we find a powerful numerical signal:
 
499
Aa6-67 Ab4-69
0 500
 
500 may seem to be a coincidence (although for me it suggests a hundredfold rima - 'fire, fire'). Before arguing further, however, the reader has to be convinced there is no fault in my calculations:
 
a1 90 483 b1 82 313
a2 85 b2 85
a3 76 b3 77
a4 82 b4 69 80
11 351
a5 83 b5 80
a6 67 84 b6 92
17 187
a7 85 b7 84
a8 85 b8 84
sum 670 sum 664
 
In the rongorongo system of measuring glyph distances, it is not always the normal counting that counts. 500 is just to draw our attention, and the main signal to observe is 314 (100 * π), i.e. the fact that Ab4-69 is the next to 314th glyph on side b. Half a cycle is completed at Ab4-69 (because the whole cycle is computed by using 2π, or 628).
 
Aa6-67 and Ab4-69 serve as markers defining half a cycle. Therefore both of the glyphs are aberrant from the norm (in order to catch attention).
 
The total number of glyphs on the Tahua tablet is 1,334 and - as I have mentioned at hetuu in this dictionary -  314 is a number involved:
 

Keiti (E)

Large Santiago (H)

Tahua (A)

side a

326

100π+12

side a

*648

200π+20

side a

670

 200π+42

side b

302

100π-12

side b

*648

200π+20

side b

664

 200π+36

sum

628

200π

sum

*1296

400π+40

sum

1334

400π+78