“In The Stranger From The Sea Winston Graham made many references to developments that happened in the ‘gap’ years,” she said.
With series four taking its basis on the seventh novel in the series, The Angry Tide, its follow-up, The Stranger from the Sea, picks up ten years later.
Poldark will end after the upcoming fifth series, the BBC has confirmed.
The new episodes will see Ross Poldark (Aidan Turner) attempt to put Westminster behind him and spend more time with his loved ones.