The Peruvian Commissioner, who was sent out to China to negotiate a treaty with Viceroy Li Hung Chang to continue the coolie traffic to Peru, was still in Tientsin waiting for the arrival of my report. A friend of mine wrote me that he had the hardihood to deny the statements in my report, and said that they could not be supported by facts. I had written to the Viceroy beforehand that he should hold the photographs in reserve, and keep them in the background till the Peruvian had exhausted all his arguments, and then produce them. My correspondent wrote me that the Viceroy followed my suggestion, and the photographs proved to be so incontrovertible and palpable that the Peruvian was taken by surprise and was dumbfounded. He retired completely crestfallen. Since our reports on the actual conditions of Chinese coolies in Cuba and Peru were made, no more coolies have been allowed to leave China for those countries. The traffic had received its death blow. CHAPTER XIX END OF THE EDUCATIONAL MISSION In the fall of 1875 the last installment of students arrived. They came in charge of a new commissioner, Ou Ngoh Liang, two new Chinese teachers and a new interpreter, Kwang Kee Cheu. These new men were appointed by Viceroy Li Hung Chang. I knew them in China, especially the new commissioner and the interpreter. These changes were made at the request of Chin Lan Pin, who expected soon to return to China on a leave of absence. He was going to take with him the old Chinese teacher, Yeh Shu Tung, who had rendered him great and signal service in his trip to Cuba on the coolie question the year before. Tsang Lai Sun, the old interpreter, was also requested to resign and returned to China. These changes I had anticipated some time before and they did not surprise me.