The surviving private papers of Robert Hart, Inspector General of the Imperial Maritime Customs, 1863-1911, were deposited at Queen's University, Belfast, Northern Ireland, in 1971. They have been studied in part by a few scholars, including the present writer. Most of Hart's papers, private and official, were destroyed in the Boxer Revolution, when his house and office were burned, but his private diary, in 77 volumes, was saved from the general destruction by a 4th Assistant (B) of the Customs who carried it from the house in a black tin chest. Apart from the diary, the papers consist of loose materials, some 120 packages of private letters and miscellaneous printed Customs reports for the period 1900 through 1908.