1927 or later
Booklet includes a map, points of interest, and important dates from 1513 to 1927.
Booklet: The Fountain of Youth, St. Augustine, Florida. Circa 1928. Richard Mette Collection. University of North Florida, Thomas G. Carpenter Library Special Collections and Archives. UNF Digital Commons, https://digitalcommons.unf.edu/mette_text/116/