Robert Laycock was helping renovate a home in a Sydney harbourside suburb when he found rare memorabilia from a 1920s physical culture performance hidden beneath the floor — and several old mortar shells. While the explosive discovery brought out the bomb squad and put a temporary stop to the renovation, it was the unearthing of a Bjelke-Petersen School (BJP) of Physical Culture program from 1924 that drew lasting attention. "It looked like it had just been discarded under the floor in an old area," Mr Laycock said. "It was covered up in the sand and it was very dry under...