I do not know the date, but I found this article on geocaching, from Arizona Highways. Would love to know the cacher who wrote this article.
 
http://www.arizonahighways.com/page.cfm?name=Disc_OnlineXtra405x&page=1
 


Tsegi Mike and Desert Viking
 
Till a voice, as bad as Conscience, rang interminable changes
  On one everlasting Whisper day and night repeated -- so:
"Something hidden.  Go and find it. Go and look behind the Ranges --
  "Something lost behind the Ranges. Lost and waiting for you. Go!"
 
Rudyard Kipling ,   The Explorer  1898

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