The appearance of 192 in connection with a calendar based on 360 days makes it possible to guess why:

192

360

168

The 'reflection' of 192 in 360 is 168 (i.e. 192 + 168 = 260). Both 192 and 168 are 'square' numbers: 4 * 48 = 192 and 4 * 42 = 168. In other words, a year with 360 days can be divided into two unequal 'years' ('quadrangular earths'). The 'squaring of the circle' can be accomplished by using two 'squares'.

Likewise, we can take a 400-day long year and 'square' it with the described method:

260

400

140

We recognize both 260 and 140 from the rongorongo texts, and there are also some signs of a 'year' with 400 days. 4 * 65 = 260 and 4 * 35 = 140. With some new respect we can now consider those places in the texts where we have met 65 and 35, e.g.:

G

period no.

number of glyphs

1, 2, 3

8 + 4 + 7 = 19

35

19

4, 5, 6

3 + 2 + 3 = 8

27

7, 8, 9

4 + 2 + 2 = 8

35

10, 11, 12

2 + 3 + 2 = 7

35

42

13, 14, 15

4 + 3 + 5 = 12

54

16, 17, 18

3 + 6 + 7 = 16

70

19, 20, 21

5 + 8 + 5 = 18

30

88

22, 23, 24

4 + 3 + 5 = 12

100

25, 26, 27

2 + 2 + 3 = 7

30

107

28, 29, 30

3 + 3 + 4 = 10

117

31, 32, 33

6 + 4 + 3 = 13

130

34, 0

3 + 7 = 10

10

140