Arabella King was the sister of Heziah King, the sister-in-law of Mrs. King and the aunt of Hetty, Alec, Olivia, Roger and Ruth King. She was mentioned only.
Her fiance took his life one day before the planned wedding. After that, Arabella put a blue chest in the attic. 50 years later Alec and his wife Janet King gave the key to the chest.