In this study, Marcus Mordecai Schwartz argues that there were two distinct periods in which traditions from Rabbinic Palestine exerted their influence upon extended passages of B. Rosh Hashanah. This doubling of influence resulted in a Babylonian-born text with two distinct Palestinian ancestries. This oddly mixed parentage was responsible for Bavli texts that both resemble synoptic passages in the Yerusalmi and differ from them in substantial ways. The main project of this book is to trace the dynamics of this doubled Palestinian influence and to account for the mark it left on passages of B. Rosh Hashanah.