primitive letters or sounds had been learned, the
next step was the art of combining them, so as not only to produce
single words, but very often whole sentences. Thus the first
hieroglyphic carved upon the tablet, on the back wall of the altar, in
Casa No. 3 (forming the frontispiece of the second volume of Stephens's
Travels in Central America), expresses, within itself, the name, date of
birth, place of nativity, and parentage, of _Xixencotl_, the first king
of the twenty-third dynasty of the Aztecs.

The hieroglyphics of the Aztecs are all of them both symbolical and
phonetic. Hence, in almost every one we observe, first, the primitive
sound or initial letter, and its various combinations; and, secondly,
some symbolic drawing, as a human face, for instance, or an eagle's
bill, or a fish, denoting some peculiar characteristic of the person or
thing delineated.

But to return to the Hall of Students. The men and women on the stage
were placed there as critics upon the pronunciation of each articulate
sound. They were selected from the wisest men and best elocutionists in
the kingdom, and never failed to detect the slightest error in the
pronunciation of the tutor.

The royal tongue of the Aztecs is the only one now in existence that is
based upon natural philosophy and the laws of sound. It appeals both to
the eye and ear of the speaker, and thus the nicest shades of thought
may be clearly expressed. There is no such thing as _stilted_ language
amongst them, and logomachy is unknown.

And here I may be permitted to observe that a wider field for research
and discovery lies open in the domain of _sound_ than in any other
region of science. The laws of harmony, even, are but imperfectly
understood, and the most accomplished musicians are mere tyros in the
great science of acoustics. There is every reason to believe that there
is an intimate but yet undiscovered link between _number_, _light_, and
_sound_ whose solution will astonish and enlighten the generations that
are to succeed our own. _When God spake the worlds into being, the
globular form they assumed was not accidental, nor arbitrary, but
depended essentially upon the tone of the great Architect, and the
medium in which it resounded._

Let the natural philosophers of the rising generation direct their
especial attention toward the fields I have indicated, and the rewards
awaiting their investigations will confer upon them immortality of fame.

There is a