matli. 12. Malinalli.
13. Acatl. 14. Ocelotl. 15. Quauhtli. 16. Cozcaquauhtli.
17. Ollin. 18. Tecpatl. 19. Quiahuitl. 20. Xochitl.

Using the numbers only, 1, 5, 9, 13, and 17 will denote the first
column; 2, 6, 10, 14, and 18 the second, &c.

Schultz-Sellack states that:

4, 8, 12, 16, 20 were assigned to the south.
1, 5, 9, 13, 17, to the east.
2, 6, 10, 14, 18, to the north.
3, 7, 11, 15, 19, to the west.

But, as he only quotes from the explanation of the Vatican Codex as
given by Kingsborough,[42] will present here the statement of this
authority:

"Thus they commenced reckoning from the sign of One Cane. For example:
One Cane, two, three, &c., proceeding to thirteen; for, in the same way,
as we have calculations in our repertories by which to find what sign
rules over each of the seven-days of the week, so the natives of that
country had thirteen signs for the thirteen days of their week; and this
will be better understood by an example. To signify the first day of the
world, they painted a figure like the moon, surrounded with splendor,
which is emblematical of the deliberation which they say their god held
respecting the creation, because the first day after the commencement of
time began with the second figure, which was One Cane. Accordingly,
completing their reckoning of a cycle at the sign of Two Canes, they
counted an Age, which is a period of fifty-two years, because, on
account of the bissextile years which necessarily fell in this sign of
the Cane, it occurred at the expiration of every period of fifty-two
years. Their third sign was a certain figure which we shall presently
see, resembling a serpent or viper, by which they intended to signify
the poverty and labors which men suffer in this life. Their fourth sign
represented an earthquake, which they called Nahuolin, because they say
that in that sign, the sun was created. Their fifth sign was Water, for,
according to their account, abundance was given to them in that sign.
[The five days Cipactli, Acatl, Coatl, Ollin, Atl.] These five signs
they placed in the upper part, which they called Tlacpac, that is to
say, the east. They placed five other signs at the south, which they
named Uitzlan, which means a place of thorns--the first of which was a
flower, emblematical of the shortness of life, which passes away
quickly, like a blossom or flower. The second was a certain very green
herb, in like manne