Alfred Bright became headmaster upon Frank Shann's death. The school built a second storey for the Junior School in 1952, and in the following year, the Parents' and Friends' Hall, a multipurpose venue, was built between Merritt House and Xavier College. On Alfred Bright's retirement, John Leppitt was appointed Headmaster. The school advanced greatly during his time as headmaster, the number of students reaching 812. The Robertson Science and Administration Building was opened in 1959 and extended later on, and two years later, the junior school building was extended to almost meet Roberts House, providing art and music facilities. In 1968, the Shann Building was constructed between the Robertson Building and the old Arnold Hall, as well as a major sports facility, Cornell Gymnasium.