J. Hyslop was present during the process that led to the formation of the Theosophical Society. Josephine Ransom said of him that "no information has been discovered." However, Walter A. Carrithers, Jr. writes:
"J. Hyslop," though not otherwise identified, is thought by some to have been James H. Hyslop, who, during his lifetime, rose to prominence as the leader of official Psychical Research in America, and was chief founder and head of the independent American S.P.R. In 1875 he was still a college student.
- Josephine Ransom, A Short History of The Theosophical Society (Adyar, Madras, India: The Theosophical Publishing House, 1938), 115.
- The Founding of the Theosophical Society