John Langdon (June 26, 1741 - September 18, 1819) was a politician from Portsmouth, New Hampshire and one of the first two United States senators from that state
John Langdon Down & Jerome Lejeune
what philosophies influenced john langdon?
John Langdon Down died in 1896.
John Langdon Parsons was born in 1837.
John Langdon Parsons died in 1903.
John Langdon Sibley died in 1885.
John Langdon Sibley was born in 1804.
John Langdon-Davies was born in 1897.
John Langdon-Davies died in 1971.
John Langdon Down was the first person to discover down syndrome.
John Langdon and a dog
Governor John Langdon House was created in 1784.