lanyon is a stronly opinionated respected scientists who believes that jekylls experiements are 'unscientific balderash'
lanyon represents the self satisfied certainties of victorian england as he appears to be someone who knows everything and learns to his cost that he does not
him and jekyll were unseperable
lanyon is a foil to jekyll and presents widerscientific theories presented at the time, mysticism vs rationality
(jekyll)'began to wrong..wrong in the mind' - lanyon
lanyon thinks jekyll has a 'cerbral disease' he is skeptical
lanyon cannot cope with what jekyll has doen and his life work disproving mysticism is diminished as jekyllo presents the truth and asks him to recieve drugs to help him transfrom back. his 'soul is sickened' by the unpleasant truth
he turns 'deadly pale'
lanyons death represents the death of his theories and the start of jekylls medical possibilites
'welcomed him with both hands' lanyon is kind to utterson