read the last ann, page-2

That was me.

Your memory fails you sonofdavid. During that discussion you claimed that in gold mines the grade usually increases with depth. I merely corrected your incorrect assumption. There was no discussion at the time that gold would or would not be present at depth.

And if you check the previous thread you will see that the most recent announcement has in fact been discussed: http://www.hotcopper.com.au/post_single.asp?fid=1&tid=1338530&msgid=7535248