"The Advanced-Guard" by Sydney C. Grier is a novel written in the early 20th century. This book is set during the period of British colonial rule in India, and it explores themes of military duty, personal relationships, and the complexities of life in a frontier outpost. The central characters include Lady Haigh, a determined and resourceful woman, her husband Sir Dugald Haigh, and Major Keeling, who acts as a commanding officer—each grappling with their personal dilemmas amidst the backdrop of the socio-political landscape. The opening of the novel introduces readers to the newly established port of Bab-us-Sahel, highlighting the challenges and dangers of colonial life in Khemistan. Lady Haigh's strong personality is immediately evident as she engages in a spirited discussion with her husband about the implications of their roles in this harsh environment. Their conversation revolves around Lady Haigh's kind intentions to bring a friend to the frontier, which leads to tension with Major Keeling, who is not inclined to include women in military affairs. The dynamics between the characters hint at deeper themes of love, sacrifice, and the challenges of maintaining personal morals in a tumultuous colonial setting. (This is an automatically generated summary.)