Soldering with a burner. A ceramic grill laid across two stones forms the work-bench. The burner is placed underneath.

Cliff Dreamers (Podcast)
http://www.myspace.com/cliffdreamers
A magical stoneage adventure novel written and presented by archaeologist/author Jacqui Wood. Full of mysticism, adventure, coming of age and humour. Set 6000 years ago in northern Europe.
www.archaeologyonline.org