In the case of the pueblo of Walpi, a portion of whose people seem to have been the first comers in this region, a number of changes of sites have taken place, at least one of which has occurred within the historic period. Of the various sites occupied one is pointed out north of the gap on the first mesa. At the present time this site is only a low mound of sand-covered débris with no standing fragment of wall visible. The present condition of this early Walpi is illustrated in Fig. 2. In the absence of foundation walls or other definite lines, the character of the site is expressed by the contour lines that define its relief. Another of the sites occupied by the Walpi is said to have been in the open valley separating the first from the second mesa, but here no trace of the remains of a stone village has been discovered. This traditional location is referred to by Mr. Stephen in his account of Walpi. The last site occupied previous to the present one on the mesa summit was on a lower bench of the first mesa promontory at its southern extremity. Here the houses are said to have been distributed over quite a large area, and occasional fragments of masonry are still seen at widely separated points; but the ground plan can not now be traced. This was the site of a Spanish mission, and some of the Tusayan point out the position formerly occupied by mission buildings, but no architectural evidence of such structures is visible. It seems to be fairly certain, however, that this was the site of Walpi at a date well within the historic period, although now literally there is not one stone upon another. The destruction in this instance has probably been more than usually complete on account of the close proximity of the succeeding pueblo, making the older remains a very convenient stone quarry for the construction of the houses on the mesa summit. Of the three abandoned sites of Walpi referred to, not one furnishes sufficient data for a suggestion of a ground plan or of the area covered. [Illustration: Plate XVIII. Plan of Sichumovi.] [Illustration: Fig. 2. Ruins, Old Walpi mound.] OLD MASHONGNAVI. In the case of Mashongnavi we have somewhat more abundant material. It will be desirable to quote a few lines of narrative from the account of a Mashongnavi Indian of the name of Nuvayauma, as indicating the causes that led to the occupation of the site illustrated.