I looked at an old (18thc) parish boundary map recently which marks a "cave" adjacent to the Wychbury site. I can't help think that this might have been a burial chamber which has subsequently been destroyed. This might indicate a pre iron age for the site.
I was always told that the round hill was likely to be a glacial moraine but have no geological evidence for that.
Yew tree myth suggests both death and immortality. There is a tabboo against cutting yew wood. The red sap and white hartwood became associated with the blood of Christ. They are, of course, strongly present in churchyards.
There is a burial mound visible at the top (Hagley end) of Stakenbridge Lane. The shape of it can be seen in the roadside hedge. I know nothing of the Harborough Hill stories, where can I look?
I had also heard of the Clatterbach valley being the site of a battle.
Was up amongst the yews on Wychbury last month taking another first timer to the site. Who, unprompted, mentioned the atmosphere of the site and was quite spooked when I told him that everyone else I had taken there has commented similarly.