Hunting for 'The Secret' Treasure Buried in Milwaukee - Atlas Obscura

24 Cool and Unusual Things to Do in Milwaukee - Atlas Obscura

24 Cool and Unusual Things to Do in Milwaukee - Atlas Obscura

Treasure - Atlas Obscura

12 Quirky Treasures of Milwaukee - Atlas Obscura

People Are Still Searching for Byron Preiss's Treasure - InsideHook

Searching for The Secret Casque in Milwaukee: Six Questions with John Limbach - Mysterious Writings

The Secret: Milwaukee Has a Hidden Treasure

Well, whatever - Milwaukee County Historical Society

History of The Secret - The Secret A Treasure Hunt

Hunting for 'The Secret' Treasure Buried in Milwaukee - Atlas Obscura

24 Cool and Unusual Things to Do in Milwaukee - Atlas Obscura

Hunting for 'The Secret' Treasure Buried in Milwaukee - Atlas Obscura