its characteristic strokes, it can be regarded as safely indicated;
whenever the strokes are not just those characteristic of any glyph, it
cannot be inferred. Down to the very end of the various revisions I
found myself able to add glyphs which at first seemed hopeless, and yet
when once seen became clear and plain. Relying on the presence of the
photographs to check the work, I have thus added a very considerable
number to the glyphs at first apparent. In some cases, as in 6-b-11 and
17, and especially in 8-b-7, 8, 10, where glyphs were only partially
erased, but no other instances of perfect glyphs existed to compare them
with, I have let them alone, without attempting restoration. In short, I
may have made some errors of eye, but I have guessed nothing.

In a very few places I have restored glyphs totally erased, relying on
the parallelism of the passages. Such are some of the Ahau-numbers in
the upper sections of pages 2 to 11, and in the central sections on
those pages, the initial pairs of glyphs on pages 15 to 18-a, b, c, the
first columns of pages 19 and 20, and a few day-signs on pages 21, 23
and 24. These glyphs are all necessitated by their different series, and
hence can cause no confusions; while it seemed advantageous to have them
before the eye. A fair instance of the procedure is shown on page 3-b-1,
3. The temptation was strong to put the usual [Hieroglyph] glyph here as
on all the other pages, but the slight variation in the lines left of
glyph 3-b-3 forbade it.

The restoration will further be found a little bolder on the type-cards
than in the colored plates, where I have in general only endeavored to
reproduce what could be seen actually present. The glyphs restored on
the upper part of page 7 would seem hopeless at first sight; but they
are well-known and common forms, and the characteristic traces shown on
the photographs belong to these and to no others known.

* * * * *

The cards of type-printed text, in parallel columns for convenience of
study, are self-explanatory. Such an arrangement has from the first
seemed to me indispensable for proper study and comparison. The paging
of the de Rosny editions I have retained, except to change the
practically blank page 1 to be page 25, since to number this as 1 is
confusing. For the divisions and the numbering of the glyphs I have made
my own arrangement. It is possible that section _b_ on pages 2 to 11
should only g