fencing, and was also home to a new stage for dramatic arts. Post-World War II The Schmon Infirmary and the Memorial Great Hall were built in 1949, and in that year Dr. J. R. Hamilton became the third headmaster of Ridley. Hamilton was a Science teacher and housemaster prior to becoming Headmaster in 1949. Hamilton emphasized the importance of Ridleians understanding the world around them and established periods for discussions on current affairs and debate. The Memorial Great Hall and its accompanying List of Honour plaque were dedicated in 1950 to Old Ridleians who died serving in World War II. The first issue of the Ridley Tiger was also published that year. It became the school's alumni newsletter, and ACTA Ridleiana became the school's yearbook. In 1962, Mr. Ted Pilgrim became the fourth headmaster of Ridley. A gradual increase in overall enrolment had taken place in the late 50s and 60s, leading to the building of Arthur Bishop House in 1965. The residence accommodated seventy-four boys and was named after Ridley's sixth president, Arthur Leonard Bishop. The Memorial Chapel was expanded in the 1960s to accommodate increased enrolment. In 1971, Mr. Richard Bradley became the fifth headmaster of Ridley. In September 1973, Ridley became co-educational, and eleven girls were enrolled and assigned to the first floor of Dean's House (which has since reverted to a boys' residence, given that several separate girls' residences were built). Also in 1973, the McLaughlin building was built, which was named after Col. Robert Samuel McLaughlin, who pledged CAN$900,000 from the McLaughlin Foundation. The building housed fifteen new classrooms, the new Matthews Library, a new art room, and a new biology laboratory. Today, the building is still home to the Matthews Library and classrooms. In September 1978, girls began boarding. Also that year, the Griffith Arena was opened. In 1981, Dr. Jeremy Packard became the sixth headmaster of Ridley. In 1981, the National Film Board of Canada released the documentary film Ridley: A Secret Garden about the School. In 1986, the first Chimes Challenge was held, a sprinting competition which remains an annual tradition. In 1989, as the school marked its 100th year, the Second Century Building was officially opened and dedicated as Ridley's primary science and arts facility. In the same year, Mr. Douglas Campbell became the seventh headmaster of Ridley. 1992 saw the official opening of the new headmaster's residence, Kenyon Lett House.