I was alerted today to some recently-posted photographs from Fleetwood Mac's March 1970 show in Hanover, Germany, that are on the Wikipedia website. I've never seen any of these photos before - a couple show Peter Green playing his 6-string Fender bass. Most are now included on the Wikipedia entry for "Fleetwood Mac" but there are a couple more that I found on the page for the person who uploaded them.
All the ones I've seen can be found here:
http://commons.wikimedia.org/wiki/User:W.W.Thaler The Fleetwood Mac photos are about 2/3 of the way down the page.