If I found something with such historical significance, I would keep it to myself and to a select few who could witness and attest to the evidence. It would take a lifetime of mining small scale to create wealth from silver alone. Very little would I place here in the threads for public knowledge, but rather I would use PMs to inform those I wished to inform and trust with that information. Could it be this has already been done? Could be...
There are advantages to not being an antagonist towards those whom you may disagree. There are advantages to befriending those with different views and ideas other than our own. Just by simply not trying to discredit their evidence one can gain insight into the ultimate goal of solving one of the oldest treasure legends in American history. I would suggest it is entirely possible he has received the results of an assay and may have already shared those results...whether they are good or bad results what advantage would one have in sharing them here publicly? ...other than possible bragging rights...?
It could be that Swift's mine(s) were found years ago and someone was wise enough to secure the land and rights without broadcasting it to the world. The news would draw so much attention to the person's property and privacy it seems to me a foolish idea to say anything to anyone about it. Much like winning a jackpot lottery, the tactics would be similar.
There are fine lines between legends and fairy tales just like there can be between history and legends. There are very few fairy tales that do not teach lessons. There are very few legends that are not based in some truth. I think we all forget to apply deductive reasoning in various aspects of life. Many are too quick to dismiss what they don't understand. Many times the excitement of treasure blurs peoples sense of reasoning as well. One man's junk is another man's treasure. What one man says about another man's idea don't mean a hill of beans, but it does say a lot about his character.