Nanking reached, 106; introduction to I. C. Roberts, 107; renews acquaintance with Hung Jin, 108; points suggested by journey, 109; conditions of joining Taiping government, 109; interview with Kan Wong resulting in offer of title of fourth official rank, 110; refusal, 111; passport granted and return journey to Shanghai made, 112; attention turned to money-making, 123; interview with tea-merchants at Shanghai, 124; expedition to Taiping to buy tea, 125; routes chosen and particulars of journey, 126; escorts treasure on succeeding expeditions, 128; midnight adventure with marauding horde, 130; ill health and relinquishment of tea business, 135; invited to call on Viceroy Tsang Kwoh Fan (_1863_), 137; enters service of state government (_1863_), 140; arrival at Ngan Khing and interview with Viceroy, 143, 150; temporary abode at military headquarters, 148; suggestions for establishing machine shop, 149; empowered to purchase machinery, 152; commission received (_1863_), 154; fifth official rank conferred, 154; route from Shanghai to New York, 155; class re-union at Yale, 156; order for machinery executed at Fitchburg, Mass., 156; offers himself to U. S. government as volunteer, 157; return to China, 160; report on purchase of machinery, 165; created mandarin (_1865_), 166; government interpreter and translator, 166; _Colton’s Geography_ and parts of _Parsons on Contracts_ translated, 167; school of engineering suggested to Viceroy, 166; secures co-operation of Ting Yih Chang in educational scheme, 170; proposals drawn up, 171; hindrances to their presentation to the government, 175; Tsientsin massacre furthers plans, 177; memorial for adoption of proposals signed, 180; Chin Lan Pin’s co-operation, 181; memorial sanctioned, 182; invited to Nanking to confer with Viceroy, 183; Educational Commission appointed, 183; preparatory school established (_1871_), 185; English government schools visited, 186; precedes first installment of students to U. S. (_1872_), 188; headquarters at Hartford, Conn., 189; gatling gun introduced into China (_1873_), 191; interview with Peruvian commissioner on coolie traffic, 192; relates horrors and refuses to further treaty, 193; commissioned to investigate conditions in Peru, 194; report of mission, 195; attitude of Peruvian commissioner, 195; results, 196; appointed joint Chinese minister to Washington, 198, 207; disagreement with Chin Lan Pin, 202, 205; letter to Viceroy regarding Woo Tsze Tung, 205; violation of Burlingame Treaty, 208; last official act as Commissioner (_1877_), 209; reports at Peking upon expiration of term of office (_1881_), 217; interview with Li Hung Chang on subject of recall of students (_1881_), 218; paying official calls, 219; Indian opium trade and poppy culture, 220; return to U. S. (_1883_), 220; illness and death of wife (_1886_), 221; joy in sons, 223;