Ma Huan
During his expeditions, Ma Huan took notes about the geography, politics, weather conditions, environment, economy, local customs, even method of punishment for criminals. Returned home on his first expedition, he began writing a book about his expedition, the first draft of which was ready around 1416. He expanded and modified his draft during later expeditions, the final version was ready around 1451. The title of his book was "Yingya Shenglan" (The Overall Survey of the Ocean's Shores).