The reader is asked to bear in mind that when the repair of Cliff Palace was undertaken the vandalism wrought by those who had dug into it had destroyed much data and greatly reduced the possibility of generalizations on the character of its culture. The ruin had been almost completely rifled of its contents, the specimens removed, and its walls left in a very dilapidated condition. Much of the excavation carried on under the writer's supervision yielded meager scientific results so far as the discovery of specimens was concerned; throughout the summer earth was being dug over that had already been examined and cult objects removed. Had it been possible to have begun work on Cliff Palace just after the ruin was deserted by the aboriginal inhabitants, or, as that was impossible, at least anticipated only by the destruction wrought by the elements, these explorations might have illumined many difficult problems which must forever remain unsolved. The present monograph is the second in a series dealing with the antiquities of the Mesa Verde National Park and opening with the account of the excavation and repair of Spruce-tree House.[3] An exhaustive account of all known antiquities from Cliff Palace is not intended, and no reference is made even to many objects from that ruin now in museums. Discussion of details is not so much aimed at as brevity in the statement of results and a contribution to our knowledge of a typical form of Southwestern culture. Believing that modern Pueblo culture is the direct descendant of that of cliff-dwellers, the writer has not hesitated to make use of ethnology, when possible, in an interpretation of the archeological material. [Footnote 3: _Bulletin 41 of the Bureau of American Ethnology._] Although the name Cliff Palace is not altogether an appropriate one for this ruin, it is now too firmly fixed in the literature of cliff-dwellings to be changed. The term "palace" implies a higher social development than that which existed in this village, which undoubtedly had a house chief similar to the village chief (_kimongwi_) of the Hopi, who occupied that position on account of being the oldest man of the oldest clan; but this ruin is not the remains of a "palace" of such a chief. The population of Cliff Palace was composed of many clans, more or less distinct and independent, which were rapidly being amalgamated by marriage; so we may regard the population as progressing toward a homogeneous community. Cliff Palace was practically a pueblo built in a cave; its population grew from both without and within: new clans from time to time joined those existing, while new births continually augmented the number of inhabitants.