Why may not events of an analogous character have taken place at Panuco? Was it not probably an Indian city into which the Spaniards had intruded themselves, and having left traces of their sojourn, as at _La Gran Quivira_, subsequently, owing to some dire catastrophe, or some new impulse, abandonded[TN-2] it for another and preferable location? This, we suggest, is a reasonable explanation of the presence of the Caucasian effigy found by Mr. Norman among the deserted ruins of Panuco. Mr. Stephens has, I think, conclusively proved that the past and present Indian races of Mexico were cognate tribes. I had previously arrived at the same conclusion from a different kind of evidence. What was manifest in the physical man is corroborated by his archæological remains. The reiterated testimony of some of the early Spanish travellers, and especially of Bernal Diaz and Herrera, is of the utmost importance to this question; and all that is necessary in the chain of evidence, is some link to connect the demi-civilized nations with the present uncultivated and barbarous tribes. These links have been supplied by Mr. Gregg. Those peculiar dwellings and other structures, with inclined or parapet walls,[12-++] and with or without windows, which are common to all epochs of Peruvian and Mexican architecture, are constructed and occupied by the Indians of Mexico even at the present day. After describing the general character of these modern domicils, Mr. Gregg goes on to observe, that "a very curious feature in these buildings, is that there is most generally no direct communication between the street and the lower rooms, into which they descended from a trap-door from the upper story, the latter being accessible by means of a ladder. Even the entrance at the upper stories is frequently at the roof. This style of building appears to have been adopted for security against their marauding neighbors of the wilder tribes, with whom they were often at war.