I can't remember whether it was in one of his great auction catalogs, or whether the article appeared in the Club magazine. I think Howdy was Club Historian at the time.

Here is a blurb from the Bellagio web site that dates the find:

In 1994, the Dunes south tower was imploded without fanfare to make ready for the building of The Bellagio. Bellagio construction workers stumbled onto four bags of Dunes casino chips buried at the site of the Dunes resort.