That reminds me of the time I went to Chiselhurst Caves with a friend, the last two visitors of the day. And, into the lower entrance we saw a trail of people going, clad in strange raiment, green elven weeds, chain-mail, wizardly robes and the like, masked as orcs, armed cap-a-pie: and, as we traversed the upper ranges of the caverns, we heard weird cries (and chords, no doubt), moans and groanings, shoutings, roarings and the clash of metal. Apparently there was something of that sort going on there.

I'm disappointed to hear what the SCA is: I had heard of it, and thought it might be more playing with ideas such as Hero actually doing something useful with his steam-engine.