Axes are relatively scarce, but are found in this period. Edges were smoothed by grinding. On the whole these were not very efficient cutting implements, for the edges were quite dull. Human burials varied widely according to locality. For the most part they are found in refuse heaps. These characteristic mounds, as the name indicates, were formed of the refuse thrown away by the inhabitants of a village and are composed of ashes, dirt, broken pottery, and general debris. There was no disrespect for the dead in burying them in such a place; it was simply that, with the primitive implements available, it was desirable to make interments where digging was easiest. The difficulties of excavation also led to the placing of bodies, in some cases, in abandoned storage pits or houses. Children are often found buried under floors near firepits, possibly because mothers felt that the dependence of an infant extended to the soul and they wished to keep it near. Bodies were inhumed in a more or less flexed position. There was no fixed orientation, as there was in later periods. Undoubtedly there were some mortuary offerings of a perishable nature, but these have not survived. Pottery was placed in graves in many cases. At Kiatuthlana[107] there was a strong degree of consistency in the offerings. Each grave contained a culinary jar covered by a bowl with a blackened interior, and a black-on-white bowl. Certain graves contained more than three pieces of pottery, but they were in multiples of three, with an equal number of each type. There are some very puzzling features about the disposal of the dead in Developmental-Pueblo times. In most of the San Juan area and in the Kiatuthlana region the number of graves found is about what would be expected on the basis of the population indicated by habitations. In other places, however, and particularly in the La Plata region,[95] only a very few burials have been found and they undoubtedly represent only a fraction of the deaths which must have occurred. What happened to the remaining bodies is a question which has not been answered. Some particularly baffling finds are: skulls buried without bodies, and bodies buried without heads. In the case of skull burials it has been suggested that warriors may have been killed some distance from home. Bringing the entire body back would have been impracticable, and only the heads were returned to be given suitable burial among the kinsmen of the dead individual. This, however, does not explain the headless skeletons which are also found, for it seems unlikely that the body of an enemy which had been left behind, after the head had been removed, would be given burial.