"Being the Whereabouts of Treasure of Colonial America"
"A valuable chart of sunken lost or cached Treasures in Texas and along the Gulf Coast"
"The fascinating Saga of lost and long Hidden Treasures in early California and the old Southwest"
"An Authentic, Interesting Chart of Treasurer in the Great Northwest"
My last research efforts lead to finding that they are in the Library of Congress. I could not get access to the number that they are cataloged under there.