 One example contained dowel holes for the attachment of external ears which were not found with the head, and another, smaller group of reserve heads were not made with any ears at all.Another common feature has been called the "cranial groove", a careful and deliberate cut that typically starts from the top of the cranium and extends to the back of the neck.The first reserve head was discovered in 1894, in Dashur, by the Director General of the French Service of Antiquities in Egypt, Jacques de Morgan.