For stories like this, you have to study the meaning of the claimant's word : "Found". And even "seen".
These words "found" (past tense) and "seen" (past tense) get used in relations to some supposed treasure. But when you go to scrutinize the person, it turns out that what they MEAN is: They've narrowed down the location to a certain canyon, cave, lake bottom, etc... Now it's merely a matter of overcoming government obstacles, getting a detector that goes 6 meters deep, or bringing in heavy equipment, etc.... But rest assured: They've "found" (past tense) this treasure.
Same for "seen". You scrutinize them, and what they *mean* is: They've "seen" the canyon where they are certain this fabled treasure lies. Or Seen the lake, or cave, etc..... Or they know the person who's "seen" it. But you scrutinize to meet that person who "saw" it. And .... lo & behold, they didn't actually see it. But not to worry, because they know the person who "saw" it. So you track down THAT person. And guess what ? They too didn't personally see it. But not to worry, because they got it on good authority from so & so. And so on back to infinity. But in each telling of the story, it's always first person singular.
