A few interesting (and varied!) links....
History of the 3 chasing hares motif

BBC Radio 4 broadcast on the chasing hare (16.11.04)
Listen again to the programme
Medieval art & architecture
Roo the Leathercarver
Medieval woodcut clipart
Information on the green man (click on the green man button
on the home page)
Medieval events in the UK
Unique ink drawings and cards and web design
Haunting art and photography from Italy