A physician-author presents a series of concise essays that examine Arthur Conan Doyle's detective stories through a medical lens, tracing how Dr Watson's observations reveal physiological, anatomical, and clinical detail. Topics range from weather as narrative backdrop to analyses of brain fever, poisons, surgical practice, endocrinology, genetics, cardiology, pharmacology, and zoological and botanical references, with attention to Holmes's skills as chemist and athleticism. Each essay blends literary close reading with medical knowledge to show how health, disease, and scientific detail inform character, investigative method, and atmosphere.