The collection comprises:
- Typescript extracts from correspondence and journal entries by John S. Hoyland and his father John W. Hoyland. 1910-1919;
- Correspondence from John S. Hoyland ('Jack'). Most of the letters are to his father, his wife Helen, and to other members of his family. The period 1910-1927, and consequently his life and work in India, are the main focus of the letters. 1901-1927;
- Correspondence to John S. Hoyland ('Jack'). Most of the letters are from members of his family, particularly his father and his wife Helen. 1911-1948;
- Correspondence of the Hoyland family that was not sent or received by John S. Hoyland. This includes letters sent by his wife Helen to his father and other relatives, 1872-1939;
- Other correspondence including letters from Daniel Wheeler in Russia to David Mallinson and the Balby Monthly Meeting in the 1920s. 1820-1905;
- Typescript, manuscript and printed verse by John S. Hoyland and his brother Geoffrey. c.1900-c.1930;
- Other manuscript items including: a journal of travels in Russia by John S. Hoyland (1932); memoirs of school days at West House by an unidentified author (1903); a family history memoir written by Rachel Anna Hoyland (undated); and certificates of birth and death for members of the Hoyland family (1888-1919). 1888-1932;
- Other typescript and printed items including: proceedings of a conference of Young Friends on India and Ceylon held at Kingsmead (1909); a copy of John S. Hoyland, a biography by Reginald Reynolds (1958); Hoyland's privately printed Letters from India (1930); and newspaper cuttings. The collection also contains some photographs: undated but c.1910-c.1920. 1909-1958.