Much has been made of an old wall within the grounds of Hollywood Road's police married quarters, which are supposedly a relic from the old Central College where Sun Yat-sen studied. But while this small expanse of late Victorian brickwork (left) is fast becoming a cause celebre for Hong Kong's save-our-city group, what is not known is that somewhere on the site is what could be the city's oldest functioning public toilet, built sometime before 1904. Now that the government has knocked back an application by a group of residents to save the site based on the wall, maybe they can focus on the toilet. A government insider says the latrine may look simple by today's standards, but it would have been the best available at the time. 'You've got to remember that in Hong Kong at the time, the authorities weren't necessarily most concerned with public amenities,' the insider said. 'I'm pretty sure it still works, too.' So maybe there is a more definite Sun Yat-sen connection to the site than just the old walls of the school. 'You could sit on the throne where the founder of modern China may have sat.'