A practical manual advising medically qualified practitioners on duties and conduct when called to give legal testimony, covering classes of evidence and witnesses, preparation and presentation of medico-legal reports and court testimony, distinctions between coroner's inquiries and adversarial trials, procedures for examining the living, dying, and the dead, the limits of post-mortem and expert opinion, rules on fees and subpoenas, precautions when suspicious circumstances or poisoning are suspected, and guidance on documentation, exhibits, consultation with legal authorities, and professional conduct to preserve accuracy and avoid improvised opinion.