Bara's history lesson. Wikipedia's entry on collegiate secret societies (with incomplete or missing information about the University of Chicago, P.S. and squirrels) Full absorption into PS, 1969-1970 Dissolution, 1961-1968 Formalization as an RSO, 1965-1966 Internal discussions, 1952-1960 Changing of the old guard, 1937-1949 Wartime interruption, 1941-1942 Attempts to grow, 1915- 1925 Misc correspondence #1 Misc correspondence #2 Early discussions of room, and attempts to negotiate with administration.