An imperial decree was at once issued, commanding the governor of Yunnan to proceed at once to the spot and enter upon a thorough examination of the case. Mr. Wade, however, demanded some securer guarantee that strict justice should be done. He submitted to the Tsung-li-yamen an ultimatum containing three principal conditions: that such British officials as he might see fit to appoint should go to Yunnan and assist at the investigation; that passports should be immediately issued, to enable another expedition to enter Yunnan by the same route; and that a sum of $150,000 be placed in his hands as a guarantee of good faith. The Chinese government demurred at first to these demands, but the threat of Mr. Wade to leave Peking unless they were accepted before a certain day finally caused it to give a reluctant consent. Some months were then spent in diplomatic wrangling over the conditions under which the British officials should proceed to Yunnan, and what their powers should be on their arrival there. The Chinese government showed, in the opinion of Mr. Wade, a strong desire to avoid fulfilling its part of the contract. The negotiations on several occasions assumed an acute character of danger. Both parties prepared for war. The English minister concentrated the English fleet in the China seas; the Chinese government bought up large supplies of arms and ammunition. But Prince Kung and his advisers had the good sense to see that the chances in a struggle of arms would be too unequal, and always submitted at the last moment. At last the Chinese government, having agreed to all the preliminary conditions, and having also despatched a high officer, Li-hang-chang, to Yunnan to thoroughly investigate the affair, "without regard to persons," the British minister agreed to let the English mission of investigation proceed. Mr. Grosvenor, a secretary of legation, was placed at its head. Li-hang-chang went on in advance.