Thread: Chapel and charnel house?

i didn't get this dream at all, and it's bugging me...some insight is gratefully appreciated!

I'm with mum and dad in some disused chapel. On our right is the remains of the chapel. On the left, is daylight. We appear to be waiting for something.
A man and a woman come in. I can sense their 'closeness'. It turns out that the man is a historian/archaeologist. He starts examining the ruins, we ignore him.
I notice that on one wall of the chapel are blue tiles and an inscription: 'Charnel House, Hereford' Hereford is where i live
There was a date, but i don't remember it.
I talk to the man, asking him about it. I think he starts talking about Henry V, but i don't really remember this bit very well.
He's carrying a large walking cane, and reaches into the rafters with it. Mum is horrified by his behaviour.
He pulls down something, which to me looks like the wooden side of a chair.
And he said to me 'Imagine if this came up and hit you in the side of the face.' I didn't understand, so he walked over to the far side of the ruins, where there is an abyss. He pulls back on this instrument. I'm getting the feeling it's like some kind of rubber pulley and it releases a flat disc of wood, which flies across the abyss and back to the wooden holder.
I realise it's some kind of medieval weapon. I run back to my parents, exclaiming how cool all this is, and why didn't i get shown all this in history?
they look at me blankly.
i didn't really like the atmosphere in this dream at all, particularly as my parents seemed so 'out of it' and I'm wondering what significance the ruins has for me, its not the first time I've dreamed of churches in one guise or another, and what's a 'charnel house'?