Marginalia refers to the notes, comments, or doodles written in the margins of a book or manuscript. These annotations can provide insights into the reader's thoughts, reactions, or interpretations of the text. Marginalia can vary from simple underlining to elaborate sketches, and they often reflect the reader's engagement with the material. Historically, marginalia has been found in various texts, including religious manuscripts and literary works. Notable figures, such as William Shakespeare and Virginia Woolf, have left behind their own marginal notes, which offer valuable context for scholars studying their works. Marginalia serves as a unique window into the reading experience and the cultural context of the time.