This is an anagram of the old secret O code 'hidden' in the Rennes Le Chateau parchment discovered by Berenger Sauniere, it doesn't look like much does it yet it threatens to open up a very great and dangerous can of worms -
Parchment key -
A DAGOBERT II ROI ET A SION EST CE TRESOR ET IL EST LA MORT.
TERRIBLE DANGER, SEE LOST SECRET, 4 TRIOS - III AAA TTT OOO.
This is another one -
I LED LOST SECRET MASTER BERENGER - TRIOS - III AAA TTT OOO.
Code master Berenger was certainly led by this and the discovery of the tombstone keys it led him to.