Plosives t and d suggests his harshness and repetition of something suggests he is indescribable euphemism links to mystery and tension and fear
"Such unscientific balderdash"
-shows his disgust to Jekyll's radical ways shows his rationality links to fear of science
"low growl of London"
Personification is used to present Victorian London as a filthy polluted area full of crime, as it was in the Victorian era. This further gives a sinister, dark atmosphere towards the setting of the novel to foreshadow dark events anthromophism sinister setting
"God forgive us! God forgive us!"
Jekyll's transformation is unnatural. Utterson asks God for forgiveness as in Victorian society, only God has the power to create things.
theatrical to the eye
l is the opposite to jekyll friendly and open displays emotion
the fog in chap 4 is described as 'lurid brown like the lighht of some strange conflageration' conflageration is battle language andmeans a large violent event like a war