into which we were descending. A few moments more and we landed
securely upon a solid pavement. My companion then disengaged his hold,
and stepping off a few paces, pronounced the words "_We are here_!" in
the royal tongue, and immediately a panel slid from the side of the
apartment, and a long passage-way, lighted at the further end by a
single candle, displayed itself to view. Into that passage we at once
entered, and without exchanging a single word, walked rapidly toward the
light.

The light stood upon a stone stand about four feet high, at the
intersection of these passages. We took the one to the left, and
advanced twenty or thirty yards, when Pio halted. On coming up to him,
he placed his mouth close to the wall, and exclaimed as before. "We are
here." A huge block of granite swung inward, and we entered a small but
well-lighted apartment, around which were hanging several costly and
magnificent suits of Palenquin costume.

Hastily seizing two of them, Pio commenced arraying himself in one, and
requested me by a gesture to don the other. With a little assistance, I
soon found myself decked from head to foot in a complete suit of regal
robes--_panache_, sash, and sandals inclusive.

When all was completed, Pio, for the first time, addressed me as
follows: "Young stranger, whoever you may be, or to whatever nation you
may belong, matters but little to me. The attendant guardian spirit of
our race and country has conducted you hither, in the most mysterious
manner, and now commands me to have you instructed in the most sacred
lore of the Aztecs. Your long residence in this palace has fully
convinced you of the danger to which we are both exposed; I in
revealing and you in acquiring the key to the interpretation of the
historical records of my country. I need not assure you that our lives
are both forfeited, should the slightest suspicion be aroused in the
breasts of the Princess or the nobility.

"You are now dressed in the appropriate costume of a student of our
literature, and must attend me nightly at the gathering of the Queen's
kindred to be instructed in the art. Express no surprise at anything you
see or hear; keep your face concealed as much as possible, fear nothing,
and follow me."

At a preconcerted signal given by Pio, a door flew open and we entered
the vestibule of a large and brilliantly illuminated chamber.

As soon as we passed the entrance I saw before me not less than two
hundred young per