4.2 Isolated scattered bones
At all settlement sites, with only one exception (Swifterbant S2), loose scattered bones have emerged in variable quantities. They originate from different contexts like cemeteries, occupation layers and refuse zones of the settlements. Post-depositional disturbances of graves were attested at several sites and may have been responsible for part of the dispersed remains, but there are other options that will be considered here. The explanations comprise taphonomic processes, postdepositional disturbances and intentional actions or rituals.
The number of dispersed bones in relation to the minimum number of individuals that they represent shows that only 2.5 % has been recovered, as measured by the number of bone identifications and based on the fact that the skeleton of an adult individual consists of 206 bones. So 97.5 % of the bones disappeared completely. These is not surprising as the human remains ended up above the ground and were open to the elements, to be dispersed by water or wind, eaten by scavengers, or trampled and fragmented by all kinds of activities during the occupation of the sites.
Firstly, the nature and composition of the bone elements can be of importance for assessing the taphonomic aspect. An inventory shows that compact bones, like the cranium, teeth and shafts of the long bones, constitute the majority of the bone spectrum. Skeletal parts that comprise mainly spongy bone tissue, like vertebrae, ribs and the pelvic girdle, only form a small component. Apparently the compact bones have a better survival rate (table 2). On the whole there is no pattern, which distinguishes between the degrees of weathering of the isolated bones in comparison with the formal burials. The preservation of the skeletal remains in the graves can be very bad, on the other hand isolated bones can be very well preserved, especially when incorporated in aquatic clay deposits.
Secondly, human manipulation of skeletal remains can be supported by special traces on the bones, like cut marks. They give rise to various theories, comprising not only cultural traditions concerning mortuary ritual but also acts of violence and cannibalism. Several indications of violence were observed in the material under study. The skull of a man at De Bruin showed a healed depression fracture caused by a blow on the head. In grave 1 at Schipluiden two men were interred, one of which shows a bashed-in skull. The fact that their burial differed from the others may be linked to an exceptional cause of death, probably violence. Considering that injuries to soft tissues are indistinguishable, violent behaviour might have been much more frequent and underrepresented in the osteological record. So we can expect different types of action, concerning violence and violent death of members of the local group or enemy groups, to be reflected in mortuary practices. In the case of warfare, trophy hunting should also be taken into account. The isolated skulls, that were discarded in the refuse zone at Polderweg, may be related to these habits. We can expect the same phenomenon at Schipluiden and Swifterbant. The two skulls from Urk are questionable in this respect as bad preservation prevents interpretation as isolated depositions or the last testimonies of formal burials.
Thirdly, cultural traditions can be responsible for the attested scattered remains as well. The grave at Zoelen for instance shows a secondary interment of an incomplete skeleton. Dismemberment and defleshing can be expected, either with the use of tools or in a natural way, like decomposition elsewhere and possibly above ground. At Hardinxveld-Polderweg a clavicle was found with repeated identical cut marks on it, caused by a sharp-bladed flint tool. These cutmarks were identified as perimortem – inflicted at or around the time of death – and may even be associated with cannibalism (fig. 5). A similar find at a Neolithic chambered tomb at West Tump in the United Kingdom is interpreted as an instance of decapitation (Smith & Brickley 2004).
Fig. 5 Hardinxveld-Polderweg, isolated human clavicle with cutmarks, Late Mesolithic (after Smits & Louwe Kooijmans 2001).
Cannibalism may leave some traces on the bones. One is the fracturing of the long bones and skulls to extract marrow and brain tissue. Associated features are secondary burning and cut marks, especially near the joints, for dismemberment of the body (e.g. Hurlbut 2000). These resemble the butchering marks and patterns of animals (Lyman 1987). One can expect the discarded bones to end up among faunal refuse. On the bones at our disposal we do (occasionally) observe cut marks and secondary calcinations, while they have been discarded in dumps of faunal bone. The data are too few however to conclude that cannibalism played a role or lay at the root of these dispersed human remains.