This article is the most common link given to cite this bar kochba guy and the supposed revolution in ~100bc. The sub-sub title says the one who discovered everything is an isreali military leader turned anthropologist.
Chief of Operations during the Israel War of Independence in 1948, and later Chief of Staff of the Israel Defense Forces, YIGAEL is today the ranking archaeologist on the staff of the Hebrew University. He has made many important discoveries in the Judean Desert and cares. His latest report has been edited and abridged for us by Dr. Carl C. Seltzer of the Peabody Museum, Harvard University.
They go on about how some lady lived at the time wrote about it all and put it in a pouch to be discovered by isreal military intelligence in 1960-61.
What follows is a chronological account of the discoveries made in 1960 and 1961 of Bar Kochba documents and other materials found in a large cave in Nahal Hever near En-Gedi, on the western bank of the Dead Sea.
The "dead sea" you say ...
There doesn't seem to be anything here yet