Sources

http://en.wikipedia.org/wiki/Charles_Darwin#Children

http://answers.ask.com/Science/Biology/what_did_charles_darwin_study?ad=SEO&an=SEO&ap=google.com&o=102140&qsrc=164&adt=0

http://t.answers.com/answers/#!/entry/where-did-charles-darwin-study,507eccdcd7fc7b56701d6530/2