Darwin's letters have been posted o the web: http://news.bbc.co.uk/1/hi/sci/tech/6657237.stm http://darwin1.caret.cam.ac.uk/content/view/66/35/
Apparently his Beagle voyage offered him the chance for "larking round the world". I wish I were a Victorian gentlemen of science...
Geologists are gneiss!!
