evidence: In 1826, British India gained a common border with Tibet after the British wrested control of Manipur and Assam from the Burmese, following the First Anglo-Burmese War of 1824–1826.[40][41][42] In 1847, Major J. Jenkins, agent for the North East Frontier, reported that the Tawang was part of Tibet. In 1872, four monastic officials from Tibet arrived in Tawang and supervised a boundary settlement with Major R. Graham, NEFA official, which included the Tawang Tract as part of Tibet.[citation needed] In 1873, the British drew an "Inner Line" as an administrative line to inhibit their subjects from encroaching into the tribal territory within its control.[43][44] The British boundary, also called the "Outer Line", was defined to mark the limits of British jurisdiction. But it was not significantly different from the Inner Line in this region.[45]