"Early Mandarin Chinese Lexicon" is designed as part of the Lexical Knowledgebase (LKB). The goal of LKB is to trace the historical changes of the Chinese language, and will contain a series of synchronic lexica from Pre-Qing to Modern Mandarin. This project archived materials that include written records of lectures, documents of laws and decrees, and fiction and drama of the Ming-Qing period.

http://www.sinica.edu.tw/Early_Mandarin/index.html