Complex sentence: Dickens buried his daughter in Highgate Cemetery, on a spot from which it was possible to see London, and on her own death in 1879, Dora's mother Catherine Dickens was buried with her.
Split into simpler sentences: Dickens buried his daughter in Highgate Cemetery, on a spot from which it was possible to see London. On her own death in 1879, Dora's mother Catherine Dickens was buried with her.