The letters and books of the missionaries might have flooded in over the centuries, and the eye-witness records and pictures of merchants, envoys and travelers had been translated into English in great quantities and used widely.
不錯，幾世紀來傳教士的信札書簡，卷帙繁浩，且迅速流傳；商人使節旅行家的見聞錄與畫冊，也屢見英譯翻印，廣為引用。