This is from Why Evolution is True:
"In a new communication to Current Biology, Adam Hart et al. report the discovery of a letter written to Darwin by the British entomologist Albert Brydges Farn (1841-1921). Farn lays out in his letter the evidence that color variation and change in the moth Gnophos (now Charissa) obscurata, called the “annulet,” reflected the action of natural selection. It’s the peppered-moth story in a different species. Had Darwin followed this up, say Hart et al., he would have apprehended a crucial piece of evidence missing from his theory: observation of natural selection in action." Click here to read more:
http://whyevolutionistrue.wordpress.com/2010/02/09/darwin-missed-a-chance/
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