Complex sentence: In 1871 Helen was living with her parents and son at 26 South Richmond Street and in 1881, after her father's death, she was living with her mother and her son, then an unemployed Hairdresser at 41 Clerk Street.
Split into simpler sentences: In 1871 Helen was living with her parents and son at 26 South Richmond Street. In 1881 after her father's death she was living with her mother and her son, then an unemployed Hairdresser at 41 Clerk Street.