_12. Ahau._
3. Ahau. 1. _Eb._ _12. Kan._

An inspection of this table shows us that the five days repeated in each
column are the same as those on the right of the quadrilateral of our
scheme (Fig. 2), and are exactly in the order obtained by arranging the
days of the month in four columns in the manner heretofore shown. (See
column 4, Table IV.)

If I am correct in my supposition, we then have one clue to, if not a
full explanation of, the method of obtaining the day columns in the
Manuscript Troano.

[Illustration: FIG. 3.--Copy from Plates 18 and 19, Codex Peresianus.]

Not this only, for this table of the Codex Peresianus furnishes us also
the explanation of the red numerals found over the day columns in the
Manuscript Troano. Take, for example, Plate XIX, first or upper
division, given also in my Study of The Manuscript Troano, p. 176, here
the number is IV, corresponding with column 4 of the above table (V),
where the days are the same and the numeral prefixed to each day is 4.
Plate XXVI (Study Manuscript Troano, p. 177), lower division, the days
are the same and the number over the column is XIII, corresponding with
the sixth column of Table V. This corroborates the opinion I expressed
in my former work, that the number over the column was to be applied to
each day of the column.

Why is the order of the numerals in the extract from the Codex
Peresianus precisely the same as the numbering of the Ahaues? I answer,
because each column, if taken as referring to the four classes of years,
will, when the number of the month is given, determine just the years of
an Ahau; or a fancy of the artist to follow an order considered sacred.

To illustrate, let us take the next to the right-hand column of the
table where the numeral is 1, and let us assume the month to be Pop, or
the 1st. Then we have 1 Cib, 1 Ahau, 1 Kan, 1 Lamat, and 1 Eb of the
first month, and from this data we are to find the years. As there can
be four years found to each of these days, that is a Cauac year with 1
Cib in the first month, a Muluc year with one Cib in the first month, a
Kan year with one Cib in the first month, an Ix year with one Cib in the
first month, a Kan year with one Ahau in the first month, &c., it is
evident that there will be, as the total result, just twenty years.

As I cannot repeat here, without occupying too much space, the method of
finding the years, I must refer the reader to Study Manuscript T