What strides in research have been made since then? During the mid-1800s, English physician John Langdon Down (Figure 1) devoted much of his professional life to children with mental retardation.

Similarly, on Saturday, December 1, 1849, Harvard librarian John Langdon Sibley wrote in his journal: "The standing of Dr. Webster, his uniform tenor of conduct since the disappearance of Dr ...

Hidden Cornwall Torpoint man was first to describe Down syndrome It was the Cornish physician John Langdon Down, who characterized the condition. 4 mins ...