The Lettsomian Lectures on Diseases and Disorders of the Heart and Arteries in Middle and Advanced Life, delivered in 1900-1901 by Sir W. H. Broadbent, is a seminal medical text that explores the complexities of cardiovascular health in adults and the elderly. Drawing on decades of clinical experience and observation, Broadbent provides a comprehensive examination of the physiological changes that occur in the heart and arteries as individuals age, and the ways in which these changes predispose to disease. The lectures cover a wide range of topics, including the pathology and clinical manifestations of arteriosclerosis, the impact of lifestyle and heredity on cardiovascular risk, and the diagnosis and management of common conditions such as angina pectoris, heart failure, and valvular disease. Broadbent’s approach is both scientific and practical, offering detailed case studies and clear guidance for physicians on recognizing early symptoms, interpreting physical signs, and employing the most effective treatments available at the turn of the twentieth century. He discusses the importance of careful patient observation, the role of diet and exercise, and the use of emerging pharmacological therapies. The lectures also address the psychological and social aspects of chronic heart disease, emphasizing the need for compassionate care and patient education. Rich in historical context, The Lettsomian Lectures reflect the medical knowledge and practices of their time, while also anticipating future advances in cardiology. Broadbent’s lucid style and thorough analysis make this work an invaluable resource for historians of medicine, practicing clinicians, and anyone interested in the evolution of cardiovascular care. The book stands as a testament to the enduring challenges of heart disease and the ongoing quest to understand and treat it effectively in later life.