By 1928, Mrs. Poole introduced the Hamilton family to two Scottish sisters-in-law, Mary Ann Marshall (1880-1963) and Susan Marshall, also known as Dawn and Mercedes. These two women became regular mediums at the Hamiltons’ “home circles.” The family would invite friends and members of the community to participate in their séances. Many of the persons who attended the home circles were also doctors and businessmen, such as celebrated lawyer Isaac Pitblado and Rh blood specialist Dr. Bruce Chown. The first table rappings and table tiltings of “Elizabeth M,” as Mrs. Poole was known, were followed by clairvoyance, trance states, automatic writing, visions, then the manifestations of materializations, wax molds, bell ringing and finally in 1928, ectoplasms. As a spiritualist Hamilton believed the ectoplasms to be materializations from the spirit world. He photographed the ectoplasm and Lillian took notes of what occurred in the 2nd floor room in Hamilton House. Margaret also served as recording secretary for many of her father's experiments.