His five sisters were Catherine Elizabeth Browne, Edith Hester Charles, Florence Marion Beresford-ash, Norah More and Alice Evelyn Mahon.
Browne's first task upon arriving at Fort Aijal was to capture Lengpunga, the chief responsible for the Chengri Valley raid, and recommend suggestions fitting his punishment to the commissioner.
[12] Browne would subsequently warn the ethnic groups in neighbouring areas such as Manipur to not act hostile towards the Lushais who were now British subjects.
[14] Browne gained the Lushai exonym Hmaireka due to many Mizo observing that his eyes were fixed on the path before him and rarely looked left or right.
{{sfn|Lalthangliana|2005|p=39 Captain Browne held a second Durbar of Chiefs on 14 June 1890 after the first one in May failed, and he declared that Lengpunga's chieftainship would be deposed for four years as punishment for his conduct on the Chengri Valley raid and that he was to be fined 30 guns.
Raiding was now prohibited, freedom of movement must be granted to British government employees and military forces and cessation of the chief's right to tax traders and merchants in their territory.
However, the introduction of taxes and the restrictions on hunting in their territory infuriated Khalkam, who decided to revolt against British rule.
Khalkam would hold a meeting with Western Lushai chiefs in his Zawlbuk and plan an uprising with the support of Thangula, Thamruma, Lenkhunga, Lalrima, Mingthang and Rankupa.
[16] On 9 April 1890, Browne travelled to Changsil outpost from Fort Aijal with a small party of sepoys.
[17] On the path two miles away from the Changsil outpost, Browne and his party were at a junction of roads from Fort Aijal and Khalkam's village.
[3] The famous Pasalṭha, Khuangchera was originally assigned to the ambush but couldn't make it due to following a tradition regarding family matters.
[23] Browne's office would be filled by R.B McCabe, the deputy commissioner of Lakhimpur whose reputation for pacifying the Ao Nagas was well known and recorded.