A 25 page alphabetical index to the 1930 diary

A 4 page alphabetical index to the 1931 diary

1941 Index; Index of Persons, Institutions and Diseases, 10 pages.

1942 Index; Index of Persons, Institutions and Diseases, 10 pages.

1943 Index; Index of Persons, Institutions and Diseases, 5 pages.

1948 Index; 23 pages.

1963 Index; 8 pages.

This diary is both a travelogue and report of Dr. Ferrell's 1915 trip to British Honduras (Belize), Guatemala, and Salvador (El Salvador) on behalf of the International Health Board, providing his observations of the state of public health, economic life, and culture in the three Central American nations. In the diary, Dr. Ferrell inspects the clinical and public health facilities available to the native populations and reports that the government officials in each nation are eager for support from the IHB in establishing public health campaigns to eradicate Hookworm Disease, Tuberculosis, and Malaria. He also provides his endorsement for several native medical professionals who he believes would be indispensable to the IHB's work in establishing native medical institutions and who would be deserving of IHB scholarships. Where statistical information is available, Dr. Ferrell collects figures on rates of infection and morbidity resulting from Hookworm disease, mostly from plantations in Guatemala and Salvador where the data is collected by corporate owners, the largest being the United Fruit Company, whose facilities in Guatemala are extensively reported on. Dr. Ferrell also reports on his time in Guatemala and Salvador as the guest and colleague of Dr. Walter H. Rowan, Director of the Guatemalan branch of the International Health Board, who helps him to secure an agreement with the Consejo Superior de Salubridad (National Department of Health) for the immediate establishment of an IHB public health campaign in the Republic of Salvador.

This diary provides Dr. Ferrell's observations on the state of public health affairs in Mexico on the federal, state, and local level. Visiting Mexico City, Jalapa, and Tierra Blanca, he is given a tour by Dr. Henry P. Carr, who is in charge of the RF's Mexican operations, and Dr. Jose Zozaya, Director of the Institute of Hygiene, of the recently built federal, state, and local public health facilities. Ferrell's summary of the tour suggests that these facilities are extravagantly built, taxing on Mexico's strained economy and government budgets, and highlight the lack of cooperation between federal, state, and local authorities. This concern is expressed in Dr. Ferrell's final recommendations, where he also praises the work of Dr. Carr, which has led to a "sanitary triumph" in Mexico, and suggests shifting operational focus from Hookworm Disease to Malaria containment.