[unreliable source?] The Survey of India published in 1937 a map showing the McMahon Line as the official border.  In 1938, the British published the Simla Convention in Aitchson`s contracts.   A previously published volume was recalled from libraries and replaced by a volume containing the Simla Convention, as well as an editor`s note stating that Tibet and Britain, but not China, accepted the agreement as binding.  The replacement volume has an erroneous release date of 1929 . Negotiations broke down when China and Tibet failed to reach an agreement on the Sino-Tibetan border.  Chinese plenipotentiary Ivan Chen initialled the treaty until it was validated by his government. He was then ordered by the Chinese government to reject his agreement.  The 3.