The last few winters and springs we have ben looking for lost mines or treasures in northern Nv. described in the book NEVADA LOST MINES AND BURIED TREASURES by Douglas Mc Donald. The main one we chased was the three pools of gold and the story of John Durkin finding float north of pyramid lake and assaying at $ 15000.00 a ton but never finding the lode after 400 ft. of tunnel and trenches but I believe I have. Though my assays are only $ 7800.00 a ton I think I have figured it out but I need to be about forty years younger. The other story three pools of gold has a lot of conflicting stories with the lost gold lake story where the guy that escaped Indians and stumbled into Downieville  half dead and his pockets were full of nuggets and his name was Stoddard, same guy. I think this episode was at least fifty miles south of where they say it was because of the conflicting maps, there is two high rocks. Where ever they are the black rock is a big desert or is it? Tom