Most of the correspondence was with the Reverend George L. Chaney, pastor of Hollis Street Unitarian Church in Boston. Many of the letters discuss the challenges of reaching Indians with the Unitarian message. Dall's activity in India included the operation of schools for disadvantaged children in which they would learn the English language and useful trades, the writing of pamphlets to spread the Unitarian message, and lecturing to those who would hear him.
Dall wrote more than one hundred pamphlets during his career. A clipping containing excerpts from one of Dall's most important lectures, "The Theist's Creed," appears in the collection.
The letters in the collection reflect the theological clashes of Unitarianism with Hindu pantheism. Dall centered his missionary strategy on the Brahmas (Hindus who had developed their theology into a monotheistic form of Hinduism), because he thought they would be the most receptive to the Unitarian message. His letters reveal that Dallwelcomed and took fellowship with any person who was a "theist," whether his theology was derived from a Muslim or Christian background. Also reflected in the letters was his missionary strategy of education in targeting disadvantaged groups in India and offering them an English-based education that was designed to prepare them to accept the theistic message.
Comments in one letter (July 6, 1872) concern the psychological framework of the typical Hindu of high caste. Other letters of interest describe Dall's missionary objectives and strategies and rationalize the presence of the domestic servants around him (August 5, 1872 [?]); Dall's limited financial compensation and his frugal lifestyle (September 27, 1872); and the educational challenges and propensities of "street rovers" (girls who were born out of wedlock) and Indian youths who pursued medical education and the high expenses involved with that (March 13, 1873). Additional letters discuss the building of a cemetery wall and the administration of a self-originating Indian Unitarian church at Secuderabach (April 20, 1873); the differences between the treatment of Indians by Muslims and the English, and the careers of William Roberts, the founder of India's first Unitarian Indian chapel, and his sons William Roberts, Jr., and Joseph Roberts (April 25, 1873); and the success of converting Brahmas (seekers of one God) to Unitarianism (undated).
The collection also contains a cartes de visite of Dall. Clippings in the collection, largely from the
Indian Mirror, contain excerpts and transcripts of various lectures and speeches given by Dall, opinions of people who had interests in the development of India, letters to periodical editors written by Dall, and published occurrences at missionary association meetings.