Sapphire Battersea is the 2011 sequel to Hetty Feather, written by English author Jacqueline Wilson.

After finding out that Ida, the kitchen maid of the Foundling Hospital is her mother, Hetty regularly sneaks into her room at night to bond with her.

Hetty and Ida's relationship is found out and as a result, Ida is fired and is sent away to Bignor-on-Sea (named after Bignor but based on Bognor Regis and Middleton-on-Sea) as a housekeeper to an elderly woman by Miss Sarah Smith, a member of the Board of Governors and a friend of Hetty's.

As Hetty is picked up by Mr. Buchanan's cook, Mrs. Briskett, a young man calls out to her and unsuccessfully tries to chase down the cab she was in.

She also finds a potential love interest in Bertie, the local butcher's boy, who takes her out to the fair, on a boat ride, and for a walk in the park.

Hetty's new life is soon shattered when she accuses Mr. Buchanan of plagiarising her work after she finds a poorly written manuscript of her memoir in his office under the name Emerald Greenwich.

She gets a job at Mr. Clarendon's Seaside Curiosities as "Emerald the Amazing Pocket-Sized Mermaid", making a tail out of a green dress, a bodice of pink gauze and a scallop-shell bra.

While lamenting the fact that she's truly an orphan now, she hears Ida's voice informing her that she isn't an orphan- her father is still alive.