I found the original cache site after a 3 year, part time, search. The large tree now growing out of the hole suggests it was recovered decades ago. My theory is that Shapiro recovered it, with the aid of the map, after Schultz was killed. The cache site exactly matches the known info on the map. One of the trees that marked the burial site, had the carving "1934" in it, which is the year the iron box was buried.