evidence: In the wake of this development the British encouraged the creation of Bhutan under a hereditary king in 1907, recognised it through a 1910 treaty, and brought it under its own "suzerainty." Bhutan was seen as a buffer between India and Chinese-controlled Tibet. It was in 1954 that China first published a map claiming large areas of Bhutan. Following the Tibetan revolt, China seized a number of enclaves held by Bhutan in Tibet. Bhutan, as noted earlier, was not party to the 1890 convention and has not ratified it at any point. However, the original survey of the Bhutan boundary and the first official map of Bhutan was made with the help of the Survey of India between 1961-1963. [...] The Bhutanese decided to hold boundary talks with China in 1980 and in preparation, began gathering material from their own archives, as well as those available in India and the UK. Data on the Royal Bhutan Army (RBA) patrolling limits, administrative limits and local practices were also ascertained. It was only after this process that the Bhutanese established their claim lines that were plotted on the map that was approved by the members of the 68thsession of the National Assembly in 1989. In the process, Bhutan voluntarily shed territory, though its details were not immediately disclosed. For example, older maps showed the Kula Kangri mountain and its surrounding areas within Bhutan, but the new one showed them clearly in Tibetan territory.