The related clue I was hinting at was Mike's first (second clue in the game) at Tiberias; the most famous tetrarch, at least for me, would be Herod Antipas, tetrarch of Galilee.
In music, a repeat sign is a sign that indicates a section should be repeated. If the piece has one repeat sign alone, then that means to repeat from the beginning, and then continue on (or stop, if the sign appears at the end of the piece). A corresponding sign facing the other way indicates where the repeat is to begin. These are similar to the instructions da capo and dal segno.
Repeat. Wiederholungszeichen (Ger.) A sign that a movement or part of a movement is to be twice performed. That which is to be repeated is generally included within the sign of two or four dots in the spaces...When...
10 was RECHERCHE (acute accent on the last E) which is both a French word and an English word, albeit not a common one. "Petit connu" means little-known.