Whetstone

[mcbishop]

Is there any evidence these were traded over larger distances? The description says it is a siltstone, so I can imagine them being mined is an openface deposit somewhere.

No evidence because (so far as I am aware) nobody has done any analysis of the stones concerned. The Romans were perfectly capable of importing desirable stone into Britain (Rhineland limestone for early Colchester tombstones, Niedermendig lava quernstones etc) so it may well have been the case.

Mike Bishop