"the young mother of my earliest impressions"
Mother of Charles Dickens
Public Domain Charles Dickens' mother Elizabeth

Although Dickens' own mother did not die until 1863, just seven years before him, it is thought that Dickens regarded her as 'lost' while he was still a child. 

Though initially fond of her, he resented her for sending him to work in a factory at 12 years of age, and for keeping him on there even after his father was released from debtors prison. This caused an emotional breach that persisted long into adulthood.