It is also not known where the act of excarnation took place prior to the deposition of bones within the chambers.[36] Some human bones have been found in the ditches of causewayed enclosures, a form of Early Neolithic earthen monument, while evidence for the Early Neolithic outdoor exposure of corpses has also been found at Hambledon Hill.[36] The postholes found in front of many long barrows may also have represented the bases of platforms on which excarnation took place.[36]