This essay focuses on the life and thought of Moses Margoliouth (1818–1881) one of the most well-known and accomplished converts to Christianity in nineteenth-century England. Associate of the London Society for the Promotion of Christianity amongst the Jews, disciple of Alexander McCaul, the learned missionary scholar and critic of rabbinic Judaism, and author of numerous learned tomes on Jewish history and literature in his own right, Margoliouth affords the historian a rich opportunity to chart a life journey of a highly thoughtful and articulate convert from his Jewish beginnings in Poland through his noteworthy accomplishments and frustrating defeats as an Anglican minister in England and Ireland. Margoliouth was important, this essay also argues, as a Jewish and Christian thinker, using his impressive scholarship to articulate his newly constructed identity between Judaism and Christianity. Most significant in describing his life as a convert with conflicting loyalties to both his ancestral and newly discovered faiths is the abundance of printed and manuscript materials that survive to tell his story in rich and colorful detail. In particular, his amazing account of his travels to the Holy Land as well as his partially autobiographical novel depicting the clerical life of a young English seminarian offer the historian a deeper insight into the mind and self-image of a highly ambitious clergyman struggling to define himself both as a Jew and a Christian simultaneously throughout his life.