The viri glyph type is correlated with number 29, which refers to the 29th night of the moon, when she no longer is visible after having shone for 28 nights. Viri is also correlated with major cardinal points, especially with winter solstice and the 'navel' (pito) - presumably because those are dark times.

With viri glyphs defining the 'border lines' in the rongorongo texts, where one season terminates and the next begins, they are very important for translating the texts.

The word viri has a fundamental meaning of 'going around' and when a cycle is finished it can be expressed by a viri glyph. A rongorongo text often has more than one viri glyph because it contains more than one cycle, e.g. one for each half year.

The total number of glyphs in a text may be expressed by multiples of 29, for instance in Tahua where the 1334 glyphs can be expressed as 46 * 29 (divided in sections by 4 viri glyphs):

	59		520
Aa8-26	59	Ab1-1	520	Ab7-26
-	*580 = 20 29**			-

	752
Ab7-26		Aa8-26
*754 = 26 29**

In G viri glyphs with added signs (Ga1-26 and Gb1-6) are used in a similar pattern:

	94		48
Ga1-26		Ga5-11		Ga7-1
*145 = 5 29**

	*261 = 9 29**
Gb1-6	*261 = 9 29**	Ga1-26

Excursion:

An attempt to use the knowledge gained in order to define the meanings of three viri glyphs in the text of Large St Petersburg Tablet (P).