The Bat Creek stone appears--to me anyway--to be authentic. The longest word in the inscription says (transliterated from the Hebrew): "LYHWD." Which actually reads from right to left (since Hebrew does read from right to left) and translated into English means, "for Judah or Yehudah." "L" is the Hebrew prefix in the dative case (preposition) for "for."
It dates from anywhere between the 1st century AD to the 8th cent. AD. It was found in what we know today as the state of Tennessee. Now this is a wild theory, but I'll put it forth anyway.
Now King Arthur II led a party of Britons (Welsh) to N. America in 574 AD. This date fits within the timeframe of the possible date of the Bat Creek stone. Arthur's fleet returned to Britain four years later (with his embalmed body, for he had been killed by hostile natives). I understand that Arthur II's younger brother, Madoc, died in Tennessee and was buried there. The thing is this: Arthur and his people were descended from Trojans who settled in Britain a few generations after the Trojan War ( circa 1185 BC). And the Trojans were of the tribe of Judah.
Could it be that Arthur and his fellow Britons knew that they--being of Trojan blood--knew that they were of the tribe of Judah?
We know that one name for the Troy of Homer's Iliad was "Wilusa." Could Wilusa be another way of saying Yehudah? That is--another way of saying YHWD? Which closely resembles YHVH, the name that Moses was told by the God of Israel to take to his kindred.