Haviland used the national mortality statistics for England and Wales to develop an elaborate geographical explanation based on map analysis for the cause of heart, cancer, and tuberculosis deaths. He found that females had higher rates for all three causes of death. However, although his technique was innovative his analysis was flawed. Second edition retitled, The geographical distribution of disease in Great Britain (1892). Digital facsimile of the 1892 edition from the Internet Archive at this link.