of glyphs in each subsection
many are complete, and no section is left without the correct traces of
the corresponding glyph for one or other of the positions; so that
although 5 of the 24 glyphs are totally erased, we may safely restore
them all. Other features of the comparative use and frequency of the
glyphs on these pages have already been given.

At the top of each picture is found a black and a red numeral. These
form the consecutive black "counters" or interval numbers, and the
corresponding red day numbers of subdivided tonalamatls, so common in
Dres. and Tro.-Cort. It is customary to find these tonalamatls divided
into fifths or fourths, 52 or 65 days respectively--four or five
trecenas. At the 53rd or 66th day the initial red number is again
reached, and the calculation is (by hypothesis) repeated, starting again
at the left with a new day-sign below the first. Such a column is seen
in the lower part of page 17, where we find 6 Oc, Ik, Ix; these are to
be completed by restoring below an erased Cimi and Ezanab, completing
the 260 days and bringing us around again to 6 Oc. The total of all the
black "counters" in any series must always be some multiple of 13,
usually 52 or 65, as stated. And since each "counter" is the interval
between its adjoining red numbers, wherever a red and a black number are
given, the other red number, whether before or after, can always be
filled in.

No traces of this initial column appear for the series in the middle
division, and several of the numerals are also erased. Two obscurities
must be cleared up before trying to fill out the series. On page 16
right is a partly erased black numeral, which from the traces may be
either 10 or 11. Taking it as 10, we have 13 plus 10 equals an erased
red 10; plus 5 (on page 17) equals the red 2 below the 5. This verifies
so far. But we next find--plus 5 equals 8, which is of course incorrect.
An inspection of the MS. and the photographs reveals a reddish spot (or
perhaps even _three_ such spots) in the extreme upper right corner of
the picture space, 17-a, and also a dark spot _under_ the black 5 in
17-b. It is possible that the separated red dots (one doubtful) are to
be read together as 3; or that the red dots under the 5 are to be
disregarded in the count (just as is the red 8 on the next page, 18-a),
and the red number for 17-a found in the upper right, above the seated
figure. If the red number in 17-a is 3, the two numbers in 16-c must