On the parts that are left we six times have a Chuen [Hieroglyph] with a
black number apparently belonging to it (perhaps a multiplier), and also
once a double Chuen, as in Tro.-Cort. The use of the red _kal_-sign, or
20, is frequent.

The lower division of these pages was also subdivided, into four
sections on each, which we may refer to as _d_, _e_, _f_, _g_. Each
contains a picture, with black and red numerals as above, surmounted by
four glyphs only. The pictures are all quite incomplete; neither is
there anything to add to what has been already said of the glyphs.

In the middle of page 17 one tonalamatl ends, with a red 6, and another
begins, also with 6. The second starts with the day 6 Oc, is divided
into fifths, and the initial column must have been in full: 6 Oc, Ik,
Ix, Cimi, Ezanab. The restoration of the series gives: 6^{22}2^{(15 in
two stages)}(4)^{10}1^{4}6. This however only gives a total of 51 for
the black counters. There is space to the right for another section, but
whatever may have been written there has entirely disappeared. The last
three numbers 1^{4}6 seem unmistakable, the [Hieroglyph] especially so.
If we regard the last 6 as an error for 5, and then restore ^{1}6 in
section 18-g, it would give the necessary 52. This is the one passage in
the Codex where I can see no way but to assume a mistake in the writing;
for 1 plus 4 does not equal 6, and unless for some entirely unknown
reason the error is clear.

The preceding tonalamatl may have been divided either into 52- or 65-day
periods. If the period was 52, it must have begun with an initial column
on page 15, right side. In this event it would be restored as follows:

(initial 6)^{(19 in two stages)}(12)^{6}5^{7}12^{(12 in two stages)}
(11)^{8}6,

giving 52. In this case a third tonalamatl must have begun somewhere to
the left, and ended on the erased right side of page 15.

A different restoration would carry the initial column back to the
extreme edge of page 15, when we would have this:

(initial 6)^{(2)}(8)^{8}3^{11}(1)^{(11 in two stages)}(12)^{6}5^{7}
12^{(12 two stages)}(11)^{8}6

giving 65.

To choose between these two would be mere guessing.

* * * * *

The well-known pages 19 and 20 come next. Together they make four
compartments, up and down the full length of the pages, two with red and
two with black backgrounds. Each is, or rather was, preceded by a column
of 13 "year-bearers.