Michael Collins’s biographers, Anne Dolan and William Murphy, capture the nature of this new Collins source - his diaries. They reflect on how the diaries change what we know about him, and challenge us to think differently about his life. The diaries begin with Collins a revolutionary among many; they end in 1922 with Collins as the most powerful figure in Ireland. They begin with Collins a single man; they end with him about to be married. The authors present thematic reflections on what the diaries reveal of his transformed life.