Born in Wilmot House,
Dalston, he was the twelfth child of Josiah (an insurance company actuary) and Elizabeth Mary Martin (née Lewis), Charles James was part of an extended family of children from his parents' previous marriages. Being a delicate child, he was sent off to a private boarding school in
Hastings. At 15 he was employed as a junior clerk at the insurance firm where his father worked. He studied mathematics as a requirement for a future as actuary, but showed no special aptitude. Browsing through the numerous bookshops in the area, he came across a secondhand copy of
"A Hundred Experiments in Chemistry for One Shilling." Carrying out these experiments, he was sufficiently inspired to entreat his father to allow him to pursue a career in science. He accordingly took evening classes at
King's College, London. He then studied medicine at
St Thomas's Hospital and spent some time in Leipzig studying physiology under
Karl Ludwig. ==Career==