Morse published his first large work in 1908, the year of his retirement, "The Trade and Administration of the Chinese Empire". The first volume of "The International Relations of the Chinese Empire" came out in 1910 (the third and last volume in 1918). Articles in magazines and journals included "A Short Lived Republic," which recounted his resistance to the 1895 takeover of Taiwan by Japan and the attempt to establish an independent nation. His novel, "In the Days of the Taipings" drew on the material in Volume II of "International Relations" to portray the viewpoints of both foreigners and of the Taiping leaders who rebelled against the dynasty which Morse had served. His most ambitious project was the massive documentary study of the British East India Company based on records in London's India Office, "Chronicles of the East India Company." He had first contemplated the study in 1919, and was able to carry it out only because the India Office allowed him to remove the record books and ledgers and work on them at home. He scrupulously summarized and edited some two hundred years of trade and commercial relations of the Company, giving historians a lasting documentary.