Mr Jackson and Mrs Jackson are lakeside farmers, running the farm and holiday accommodation at Holly Howe. They also own the boat Swallow, and have a dog called Ringman.
Mrs Jackson is helped by the girl Fanny (WH13)).
When Susan says almost hopefully We may meet Mrs Jackson she was far away, trying to remember who was trumps (WH18). Later when John, Susan and Peggy set off at night on the rescue expedition, she just says Don't you go too far .... You won't be long. If it was Mrs Dixon they would probably never have been allowed to set out. But Mrs Jackson's mind moved more slowly and she says Funny I never saw them go (WH25).