> Ever so slightly off-topic: the link to Dr.
> Grant's discovery of wood in the shafts - were
> they ever subjected to C-14 dating? If so, what
> were the results?
From memory, this was the famous bit of wood that "was lost" in the Marischal Museum (who are probably fed up with the all the requests on this topic over the years).
(I suspect that it disintegrated some decades ago - and, perhaps because the potential value of the fragments wasn't fully appreciated in former days, possibly the staff disposed of them.)
However, IIRC, the Museum's position is that they are continuing to keep an eye out for the object ... so you never know: perhaps something might come to light one of these days.