Miss Huskisson is an old friend of Miss Turner, whose “usual summer routine” is to stay with the Great Aunt to “take the waters at Harrogate".
Hence in The Picts and the Martyrs the Great Aunt has to leave Beckfoot to prepare for her visit before Molly Turner and Captain Flint return from their cruise “round the coasts of Scandanavia” (PM3,30).
Her surname probably comes from the MP William Huskisson who was killed by George Stephenson's Rocket in 1830; AR recalls in his Autobiography (page 17) that his surgeon great-grandfather John Atkinson Ransome was brought from Manchester to attend Huskisson after the accident.