Besides excavating many of the kivas enclosed within the pueblo rooms, Morris also excavated the large Chaco-like kiva in front of the northeast corner, as well as the Great Kiva which is centrally located on the south side of the plaza. Later, in 1933 and 1934, Morris returned to Aztec and supervised the stabilization and reconstruction of this Great Kiva, so that today you see it as it supposedly existed when the Indians used it for ceremonial purposes. Immediately to the west of the main ruin, where the brush had been cleared, Morris found a rather extensive low mound area. The surface was an orderless succession of hummocks and depressions, the former thickly strewn with cobblestones, the whole presenting an appearance characteristic of most of the ruins in this end of the valley. Thinking these might be the remains of an earlier structure, he excavated most of it. To his surprise, the reverse proved to be true. Although there had undoubtedly been an earlier Chaco-like sandstone structure at this point, most of it had been torn down and the debris carried elsewhere or utilized in building the great ruin itself. Morris said: Overlying the earliest remains there are deposits of clean earth, some of it presumably laid down by the elements, but the bulk of it is excavated earth intentionally dumped where it lies. At some later date, the Mesa Verde-like people had built cobblestone houses, pit rooms, and small kivas on top of this earlier debris. Today the outline of some of these cobblestone walls can be seen on the ground just to the left of the visitor trail as it proceeds northward to enter the main part of the West Ruin. Since Morris’ excavations at Aztec, there has been sporadic digging, much of it in connection with the Service’s ruins stabilization program. To prevent soil moisture from seeping into the lower footings of these ancient walls, it is frequently necessary to dig down to their bases and cap them with concrete or preserve them by other suitable methods. In doing so, old refuse pits, broken fragments of pottery, or even a burial is occasionally turned up. Recently, in making excavations in which to place dry barrels for drainage purposes in two rooms on the east side, two interesting ovenlike structures, each exactly centered in a room, were accidentally found. Their location in adjoining rooms, and their central position in the rooms, precludes the possibility that they were pit ovens from an earlier period before the pueblo was built. Doubtless they had been placed deliberately in these two rooms, and they may have been used for roasting large quantities of corn or preparing certain types of baked corn meal or cornbread.