Have you seen this?
www.amazon.co.uk/gp/product/1854142836/ref=wl_it_dp/202-6185333-9282223?ie=UTF8&coliid=I1HHBJPJP3BUTF&colid=2MWLOA9TZHK3F
( The Teviot Moose major 5th., Fri 29 Dec 2006, 14:57, archived)

Ooh.
Interesting.

There's a lot of stuff down there that you just don't think about... the pneumnatic tubes thing for a start www.capsu.org/history/pneumatic_despatch.html
( Gizmo.mp3 does not exist, Fri 29 Dec 2006, 15:04, archived)