Its there now, although the links on the home page have disappeared (click here). Quick, someone save it!!
A while ago there used to be a collection of concertina sheet music scanned from an old victorian book found at www.juliettedaum.com/concertinabook. This has sadly recently been taken down.
Edit: OK I've got it - its a bunch of files around 25MB in total, but I'll see what I can do to make it more immediately usable.
Panic over, Al!
For anybody interested, I used Webreaper to catch it all.
Edited by wes williams, 29 October 2010 - 12:13 PM.