In Chapter 1, Enfield reports seeing Hyde “trampled calmly over the child’s body and left her screaming”.
The juxtaposition of "trampled calmly" indicates how Hyde feels no remorse for his crimes, and how the act of violence is a habitual event that he fulfils without much contemplation.
"Delight from every blow"
It is shocking how much pleasure Hyde gets from the murder of Carew.
He feels “glee” and tasted "delight from every blow" as he attacked him.