I sprang to my feet with all the eagerness of joy, and was about to rush into the arms of Pio, when he suddenly checked my enthusiasm by extinguishing the light. I stood still and erect, like one petrified into stone. That moment I felt a hand upon my arm, then around my waist, and ere I could collect my thoughts, was distinctly lifted from the ground. But I was carried only a few steps. On touching the floor with my feet, I was planted firmly, and the arms of my companion were tightly drawn around my own so as to prevent me from raising them. The next instant, and the stone upon which we stood suddenly slid from its position, and gradually sank perpendicularly,--we still retaining our position upon it. Our descent was not rapid, nor did I deem it very secure; for the trap-door trembled under us, and more than once seemed to touch the shaft 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.