Down with Dat - brief history of Down Syndrome

This is really fascinating...

Part 1 - how it got its name
http://downwitdat.blogspot.ca/2011/10/brief-history-of-down-syndrome-part-1.html

Part 2 - pre-part 1
http://downwitdat.blogspot.ca/2011/10/brief-history-of-down-syndrome-part-2.html

Part 3 - famous families
http://downwitdat.blogspot.co.nz/2012/05/brief-history-of-down-syndrome-part-3.html