example of how minds easily embellish anything treasure related:
~10 yrs. ago, there was an old-town sidewalk tearout, in a city about 30 minutes from me. The workers would take out about a half block of sidewalk, and lay the new cement, all in the same day. This was because they didn't want the store-front proprietors in this downtown shopping district, to have no front sidewalks for over-night periods. So the tearout and re-install would be done in such a way, that naked earth was only exposed for a few hours. Then the next day, they would progress to the next half block, and repeat. And so on and so forth, till the entire 5 block length, both sides of the street were done.
So in order for my friend to detect where they'd torn out the walks, he had to hunt WHILE they were working. He would furiously hunt during their lunch hour, to get as many signals as he could, before they returned to work for phase II, which was to lay down the new cement. He got seateds, barbers, tokens, etc.... and was having a fun time at it

As the days progressed, the workers began to take interest in what he was doing. And each day, they would ask him what he'd found. He'd show them the day's finds, and ... even pass out IH's and V nickels (if he knew they weren't key-dates), as ... uh .... "bribes" haha.
One day, my friend dug some sort of antique owl shaped lapel-pin pendant thing. It was gold colored, and had some sort of red jewels for the eyes. When it came time for the workers came over to see what that day's take had been, she showed them the coins. Then he showed them the owl pendant thing. He mused "it might be gold" (because it was gold colored). And then told them "the eyes look like rubies". And then surmised the age as could be 1800s (as that was the date on most of the coins he was finding). They were all spell-bound, and passed it around for each to handle and look at.
That night, my friend sorted his finds. He cleaned up the owl thing. Turned out it was just gold plated, not real gold. And the eyes were just cheap glass chips. Nothing valuable, not "rubies", etc... Just junk 1920s costume jewelry. So he chucked it in the trash and forgot about it.
The next day, my friend was out there again, doing his thing. Only this day, he could see a heavy-equipment worker who kept on looking at him funny. Like, the operator was studying my friend from a distance, trying to get up his courage to come over and talk to him I guess. Eventually the worker came over and asked what my friend had found. My friend recognized that this was a new worker, who had not been on that job-site prior to this. And this particular day, he had found nothing good. So he told the worker that he had found nothing of interest, no coins, etc...
At that, the worker started telling my friend that...... the day before ........ a guy had been there with a metal detector, and found "gold and silver, gold coins, silver dollars, etc...." At first my friend was shocked and wondered "gee, did someone else come here after I left, and found gold ?" So he pressed the worker for information. As the worker told the story, he let out a clue: A gold item was described as "gold owl". As soon as my friend heard the word "owl", he busted out laughing. Because he knew then, that the worker was talking about HIM ! And it turned out, that he was getting his information from the other workers, earlier that morning, in water-cooler conversation talk.
He explained to the worker that a) the owl was not gold, not that old, not emeralds or rubies, and not valuable. b) no, there had been no "gold coins" found, nor "silver dollars", etc.... Just a few seated dimes and a single quarter or half, a few IH's and early Wheaties, etc... When the worker heard this, he adamantly disagreed. He assumed that it must be someone different then. Because he had heard it "first hand", that there was ancient coins, gold, silver, etc.... being turned up. So he wouldn't believe my friend, that ...... in fact .... this was not true. He kept figuring that it must be another hunter who'd arrived later.
Now, think of it: Let's say that the local newspaper had interviewed that worker. And the worker spills this story to the reporter. And then 100 yrs. goes by, and you or I pick up that article and read it. Here's the factoids that would come out:
a) The worker was a duly appointed authorized person, allowed to be inside the yellow barricades.
b) he had seen "with his own eyes" the coins (because another worker showed him a merc, or a V-nickel, or whatever).
c) he is a credible source, since he is an authorized worker on the crew who had the contract to be there, digging, etc.....
d) If you go to that city 100 yrs. from now, after reading that story, asking "can I please tear out the sidewalks so I can look for gold and silver?". Let's say that the city refuses, and says "no". Well now, that *CERTAINLY* smells of a coverup. Most certainly the city knows what's there, and doesn't want anyone else to get ahold of the goodies. So they down-play it, claim there's no gold and silver, etc... Hmmm, pretty sneaky of them, eh? I smell a conspiracy, don't you ?