I believe -
I read somewhere that he was referred to as the 'Darwin Watch Dog' or some other variation of those words. I commend him for his intelligence in both science and literature, his defense of agnosticism in the rightly titled 'Agnosticism and Christianity' is brilliant.
Lately I've been reading pieces from scientists/writers, I'm not really sure what sparked the phase, currently I'm reading Ernst Mayr's 'The growth of biological thought.' This is a very good/interesting book.