Chiltern Archaeologists suspect the site in Hambleden could have been a Roman brothel – where unwanted babies were systematically killed.
Dr Jill Eyers, who lives in Lane End, said the group has discovered cut marks on the bones of one of the babies.
She added: “These were knife marks and would represent a dismembering of this infant. We are horrified to say the least and are now about to closely check all other infant skeletons.
“If dismembered this could be signs of a ritual activity at this site. This is turning more sinister by the minute.”