4. Against the Makau and other tribes in the neighbourhood of Sinbo, who were responsible for the destructive attack on Nanpapa in May, and for another in August on trading boats at Hlegyomaw on the Mogaung River. The control of these operations was taken by Sir George White at the Chief Commissioner's request, the military police in the subdivision being placed at his disposal. While the necessary preparations were being made, letters of the nature of an ultimatum were sent to the Sawbwas of Thama and Panga and other tribal chiefs, requiring them to make formal submission to the subdivisional officer at Mogaung, to pay for the damage done by them to traders, and to surrender Po Saw and Bo Ti, who had lately added to their crimes the murders of Shwè Gya, the best friend the British Administration had in Mogaung, and of the loyal headman of Kamaing who had always helped us. On the 7th of January, 1889, the force[49] detailed for these expeditions left Mogaung under command of Captain O'Donnell.[50] The first step was to occupy Kamaing, after a very slight opposition by the Thama Sawbwa's men, and to establish a permanent military police post there. Unfortunately smallpox broke out amongst the Gurkhas of the Levy, and Captain O'Donnell found it necessary to halt at Kamaing until the 15th of February, and thus a whole month of the most favourable season for military operations was lost. On the 15th of February, the men's health having been restored, the force fell to work with energy, and engagement rapidly followed engagement. On the 16th of February three villages were taken after some resistance. On the 17th the Kachins were encountered on a strongly stockaded position, which was taken and destroyed. On the 19th Thama itself was taken. The enemy here showed more fight. Three men of the Hampshires received gunshot wounds, and two officers and eleven men were injured by bamboo spikes. Captain O'Donnell's report gives the following account of this engagement, which shows the nature of the fighting in these expeditions:--