Thomas Huxley  
   Biographical profile includes portrait and excerpt from his writings.
   http://www.ucmp.berkeley.edu/history/thuxley.html

History of Ideas: Thomas Henry Huxley  
   Detailed biographical article by David Knight, made available by Thoemmes Press.
   http://www.thoemmes.com/404.asp?404;http://www.thoemmes.com/encyclopedia/huxley.htm

The Athenaeum: Thomas Henry Huxley  
   Brief profile and synopsis of his scientific thought.
   http://www.lexicorps.com/Huxley.htm

Biography.com: Huxley, Thomas Henry  
   Brief biographical entry.
   http://search.biography.com/print_record.pl?id=5627

Ehux: Thomas Henry Huxley  
   Portrait and short review of this zoologist's legacy.
   http://www.soes.soton.ac.uk/staff/tt/eh/huxley.html

Thomas Henry Huxley  
   Short introduction by Daniel G. Blackburn to the man who became known as "Darwin's Bulldog."
   http://shakti.trincoll.edu/~blackbur/huxley.html

BBC History: Thomas Henry Huxley (1825 - 1895)  
   Concise biography of this early evolutionist.
   http://www.bbc.co.uk/history/historic_figures/huxley_thomas_henry.shtml