> I know this is a little off topic but I'm stumped. Last summer, whilst
> around in the shallows on our small local chalkstream (Box Brook,
> laying in the gravel I found what I believe may be a boars tusk of some
I think they've got a display in Devizes Museum of a "shaman" who had boars
tusks as part of his costume. It's now sadly many years since I last went
there and my memory may not be accurate and they may have changed their
displays a lot since then - great museum. They were very friendly and
helpful and should be able to tell you what you've found.