Roman Cavalry

I think I'm becoming a fan of BBC 4. Tonight they showed a reenactment of the Roman cavalry in Carlisle.  An amazing sight which the archeologists really enjoyed and learnt from.  You have to have a lot of imagination as an archeologist, sometimes it leads them astray, sometimes they find the right answers , or at least we hope so.  Archeology is fascinating, but one and one does not always make two.  As I said a lot of imagination is needed and it is difficult to sort the useful imagination from someone sticking to their own pet theory, come what may.