Forrest Fenn told NPR in 2013 that he hid the box in the midst of the Great Recession to cheer folks up.

FILE – In this March 22, 2013, file photo, Forrest Fenn sits in his home in Santa Fe, N.M. A grandson of Forrest Fenn has confirmed the identity of a medical school student from Michigan reported to have found an over $1 million treasure chest that the retired art and antiquities dealer stashed in the wilds of Wyoming over a decade ago. Jonathan “Jack” Stuef, 32, found the treasure in June, Fenn grandson Shiloh Forrest Old posted Monday, Dec. 7, 2020, on a website dedicated to the treasure. (AP Photo/Jeri Clausing,File)