Anne Halkett (née Murray) (1622/3–1699), stands as one of the most important devotional and autobiographical writers of seventeenth-century Britain. Her surviving manuscripts—fourteen volumes of Meditations alongside her True Account of My Life—constitute a vivid record of female authorship that integrates personal biography, theological reflection, political witness, and material self-fashioning. Her True Account offers a casuistical autobiography in which episodes of scandal, betrayal, and political intrigue are tested against the tribunal of conscience: it appropriates tropes of romance while insisting on truth, producing a hybrid narrative of devotion and defense. The Meditations demonstrate her literary discipline and spiritual disposition. Organized into “select” and “occasional” forms, the material form of the manuscripts is integral to their meaning. From calfskin bindings to inserted scraps of paper, from lists of contents to retrospective annotations, the physical features of the volumes embody her understanding of writing as durable devotion. Together, these writings illuminate how Halkett articulated her identity as mother, widow, Royalist, and adherent of the Church of England. They show how private manuscripts could function as devotional books, political testimony, and enduring memorials. They also demonstrate the literary innovation of a woman who reconfigured autobiography, romance, and casuistry into a single mode of witness.