Two months after receiving the first letter, a second one came urging me to come to Ngan Khing as early as possible. This second letter enclosed a letter written by Li Sien Lan, the distinguished Chinese mathematician, whose acquaintance I had also made while in Shanghai. He was the man who assisted a Mr. Wiley, a missionary of the London Board of Missions, in the translation of several mathematical works into Chinese, among which was the Integral and Differential Calculus over which I well remember to have “flunked and fizzled” in my sophomore year in college; and, in this connection, I might as well frankly own that in my make-up mathematics was left out. Mr. Li Sien Lan was also an astronomer. In his letter, he said he had told Viceroy Tsang Kwoh Fan who I was and that I had had a foreign education; how I had raised a handsome subscription to help the famine refugees in 1857; that I had a strong desire to help China to become prosperous, powerful and strong. He said the viceroy had some important business for me to do, and that Chu and Wa, who were interested in machinery of all kinds, were also in Ngan Khing, having been invited there by the Viceroy. Mr. Li’s letter completely dispelled all doubts and misgivings on my part as to the viceroy’s design in wishing to see me, and gave me an insight as to his purpose for sending for me. As an answer to these letters, I wrote saying that in a couple of months I should be more at liberty to take the journey. But my second reply did not seem to satisfy the strong desire on the part of Tsang Kwoh Fan to see me. So in July, 1863, I received a third letter from Chang and a second one from Li. In these letters the object of the viceroy was clearly and frankly stated. He wanted me to give up my mercantile business altogether and identify myself under him in the service of the state government, and asked whether or not I could come down to Ngan Khing at once. In view of this unexpected offer, which demanded prompt and explicit decision, I was not slow to see what possibility there was of carrying out my educational scheme, having such a powerful man as Tsang Kwoh Fan to back it. I immediately replied that upon learning the wishes of His Excellency, I had taken the whole situation into consideration, and had concluded to go to his headquarters at Ngan Khing, just as soon as I had wound up my business, which would take me a complete month, and that I would start by August at the latest. Thus ended the correspondence which was really the initiatory step of my official career.