10Grinsell, L.V. "Some Aspects of the Folklore of Prehistoric Monuments." Folk-lore 48 (1937): 248.
The author states that "...monuments erected during the Neolithic and Bronze Ages bespeak a very strong cult of the dead, so strong that it has even been said that the prehistoric races spent the best part of their lives erecting tombs for their dead, and it is almost only these tombs that have survived to the present day. It seems most likely that the cult in question was one of ancestor-worship."