Sonitpur district
The British annexed the then Assam into the Indian British Empire in 1826. After1826 the Lower Assam and the Central Assam (Darrang, Nagaon and Raha) were made one division which extended up to Biswanath. The division was placed under one Administrative Officer designated as the Principal Assistant to the Commissioner. The Upper Assam portion was left to the native rulers with supervisory control under a British political agent with political headquarters at Biswanath. Captain Neufville was the political agent for Upper Assam. Darrang Division was administered till 1833 from Guwahati.