Babylonian Biblical manuscripts from the Geonic period contain no cantillation marks in the current sense, but small Hebrew letters are used to mark significant divisions within a verse. Up to eight different letters are found, depending on the importance of the break and where it occurs in the verse: these correspond roughly to the disjunctives of the Tiberian system. For example, in some manuscripts the letter "tav", for "tevir" (break), does duty for both Tiberian "tevir" and "zaqef". In general there are no symbols for the conjunctives, though some late manuscripts use the Tiberian symbols for these. There is also no equivalent for low-grade disjunctives such as "telisha gedolah": these are generally replaced by the equivalent of "zaqef" or "revia".