This week in 1989, the Chinese authorities massacred protestors in Tiananmen Square, Beijing. I was editing this paper. It struck me that the people of Hong Kong would suffer huge collateral damage. The Spectator should campaign for them, I thought, and draw attention to the dangers of trusting China to honour the 1984 Sino-British Agreement which Mrs Thatcher and Deng Xiaoping had made to provide for the handover to China in 1997.