[1] On 15 March 1929, Hopingstone was born on Hajur Shon at Nonglait village in present-day West Khasi Hills district.
[2] He was the oldest serving representative member in Meghalaya and has never been defeated in a legislative assembly election.
He was actively associated with educational organisations and their programmes, also fought single-handedly against uranium mining in the State.
Beside the political arena, he was an agriculturist, school teacher and social worker; he was the president of the Hill State People's Democratic Party, previously associated with the Eastern India Tribal Union since 1957, it was renamed All-Party Hill Leaders Conference in 1960.
The 86-year-old veteran and most decorated politician of his time, Mr. Lyngdoh, who represented Nongstoin constituency of West Khasi Hills district in the Assembly, died on September 26, 2015, at the Northeast Indira Gandhi Regional Institute of Medical and Health Sciences (Neighrims) in Shillong.