After Franklin's death, Klug succeeded her as group leader, and he, Finch and Holmes continued researching the structure of the polio virus. They eventually succeeded in obtaining extremely detailed X-ray images of the virus. In June 1959, Klug and Finch published the group's findings, revealing the polio virus to have icosahedral symmetry, and in the same paper suggested the possibility for all spherical viruses to possess the same symmetry, as it permitted the greatest possible number (60) of identical structural units. The team moved to the Laboratory of Molecular Biology, Cambridge in 1962, and the old Torrington Square laboratories were demolished four years later, in May 1966.