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‘Man is not truly one, but truly two’: duality in Robert Louis
Stevenson’s Strange Case of Dr Jekyll and Mr Hyde
Greg Buzwell considers duality in Strange Case of Dr Jekyll and Mr Hyde, exploring how the
novel engages with contemporary debates about evolution, degeneration, consciousness and
criminal psychology.
Robert Louis Stevenson’s Strange Case of Dr Jekyll and Mr Hyde (1886) is a late-Victorian
variation on ideas first raised in Mary Shelley’s Frankenstein (1818). Stevenson’s monster,
however, is not artificially created from stitched-together body parts, but rather emerges fully
formed from the dark side of the human personality. In the story Dr Jekyll, an admired member of
the professional Victorian middle-classes, conducts a series of scientific experiments which
unleash from his own psyche the ‘bestial’ and ‘ape-like’ Mr Hyde (ch. 10). Gothic fiction had
examined the idea of the sinister alter ego or double before on many occasions but Stevenson’s
genius with Jekyll and Hyde was to show the dual nature not only of one man but also of society
in general. Throughout the story, respectability is doubled with degradation; desire with restraint;
honesty with deceit. Even London itself has a dual nature, with its respectable streets existing
side-by-side with areas notorious for their squalor and violence.
Viewed on a simple level, Dr Jekyll is a good man, much admired in his profession. Mr Hyde,
meanwhile, is evil. He is a murderer; a monster who tramples upon a small girl simply because
she happens to be in his way. On a deeper level, however, the comparison is not merely
between good and evil but between evolution and degeneration. Throughout the narrative Mr
Hyde’s physical appearance provokes disgust. He is described as ‘ape-like’, ‘troglodytic’ and
‘hardly human’ (ch. 2). As Mr Enfield, a well-known man about town and distant relative of
Jekyll’s friend Mr Utterson, observes ‘There is something wrong with his appearance; something
displeasing, something downright detestable’ (ch. 1).
Some 15 years before Jekyll and Hyde, Charles Darwin had published The Descent of
Man (1871), a book in which he concluded that humankind had ‘descended from a hairy, tailed
quadruped’ which was itself ‘probably derived from an ancient marsupial animal’.
[1]
Going back
even further, Darwin hypothesised that these stages of evolution had been preceded, in a direct
line, by ‘some amphibian-like creature, and this again from some fish-like animal’. Such a
nightmarish biological lineage that denied the specialness of humans, feeds into many late-
Victorian Gothic novels. Dracula’s ability to transform into the shape of a wolf or a bat is one
example, while Dr Moreau’s experiments upon the hapless animals on his island as he attempts
a barbaric form of accelerated evolution is another.
Stevenson’s portrayal of Hyde works in a similar fashion. Mr Hyde is regarded as physically
detestable but perhaps only because he subconsciously reminds those he encounters of their
own distant evolutionary inheritance. When Dr Jekyll’s medical colleague, Dr Lanyon, witnesses
Hyde transform back into Jekyll, the knowledge that the ugly, murderous beast exists within the
respectable Victorian scientist sends him first to his sick-bed, and then to an early grave.
Double lives and misleading appearances
The depiction of Dr Jekyll’s house was possibly based on the residence of famous surgeon John
Hunter (1728-1793), whose respectable and renowned house in Leicester Square in the late 18th
century also had a secret. In order to teach and to gain knowledge about human anatomy,
Hunter required human cadavers, many of them supplied by ‘resurrection men’ who robbed fresh
graves. These were brought, usually at night, to the back entrance of the house, which had a
drawbridge leading to the preparation rooms and lecture-theatre.
The front aspect of Dr Jekyll’s house presents a ‘great air of wealth and comfort’ (ch. 2).
Meanwhile Mr Hyde, soon after we first encounter him, is seen entering a building which displays
an air of ‘prolonged and sordid negligence’ (ch.1). The twist is that the reputable front and the
rundown rear form two sides of the same property. Stevenson is not only making the point that