The plans obtained have involved much careful work with surveying instruments, and have all been so platted as faithfully to record the minute variations from geometric forms which are so characteristic of the pueblo work, but which have usually been ignored in the hastily prepared sketch plans that have at times appeared. In consequence of the necessary omission of just such information in hastily drawn plans, erroneous impressions have been given regarding the degree of skill to which the pueblo peoples had attained in the planning and building of their villages. In the general distribution of the houses, and in the alignment and arrangement of their walls, as indicated in the plans shown in Chapters II and III, an absence of high architectural attainment is found, which is entirely in keeping with the lack of skill apparent in many of the constructional devices shown in Chapter IV. [Illustration: Plate II. Old Mashongnavi, plan.] In preparing this paper for publication Mr. Cosmos Mindeleff has rendered much assistance in the revision of manuscript, and in the preparation of some of the final drawings of ground plans; on him has also fallen the compilation and arrangement of Mr. A. M. Stephen’s traditionary material from Tusayan, embraced in the first chapter of the paper. This latter material is of special interest in a study of the pueblos as indicating some of the conditions under which this architectural type was developed, and it appropriately introduces the more purely architectural study by the author. Such traditions must be used as history with the utmost caution, and only for events that are very recent. Time relations are often hopelessly confused and the narratives are greatly incumbered with mythologic details. But while so barren in definite information, these traditions are of the greatest value, often through their merely incidental allusions, in presenting to our minds a picture of the conditions under which the repeated migrations of the pueblo builders took place.