Harold or "Norman" as he is called in the Hamilton records was interviewed by Norman James Williamson about his experience with the Hamilton group in 1982. When Sir Arthur Conan Doyle, author of the Sherlock Holmes series, came to Winnipeg as part of a cross North American tour in 1923, he attended one of the Hamiltons’ home circles. Even after his death, the Hamiltons tried to contact Conan Doyle by mediumship. In 1935, T.G. Hamilton died suddenly of a heart attack. His wife Lillian and his daughter Margaret continued his work. Lillian and her son James Drummond produced a summary of T.G.’s work in the book "Intention and Survival", published in 1942. When Lillian died in 1956, her daughter Margaret carried on. She wrote a series of articles in 1957 for "Psychic News" in England. These thirteen articles were collected in a booklet and also circulated to daily papers throughout Canada. Margaret later produced a second edition of "Intention and Survival" in 1977; a third edition came out in 1980.