"Memoirs of the Jacobites of 1715 and 1745. Volume I." by Mrs. A. T. Thomson is a historical account written in the mid-19th century. This work serves as a collective biography of the Jacobite movement, focusing on key figures and events surrounding the risings of 1715 and 1745. The narrative promises to explore the motivations, actions, and fates of those who supported the Stuart cause, shedding light on various individuals and their contributions to these tumultuous periods in British history. The opening of the book situates the reader within the context of Jacobite history, emphasizing the need for a comprehensive account because previous works were often fragmented or overly focused on public affairs. The author expresses a desire to provide an impartial view while inviting the reader to consider both the noble and the base elements within the Jacobite ranks. Additionally, the introduction highlights the important figures who played pivotal roles in the movements, such as James Stuart and the Earl of Mar, setting the stage for detailed biographical accounts to come in subsequent chapters. (This is an automatically generated summary.)