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Mere (Mary) Harper (7 May 1842 – 30 May 1924), born Mary Apes / Mere Hipi and also known as Big Mary or Mere Hapa was a porter, cultural informant, and midwife of Kāi Tahu and Kāti Huirapa descent. She was the main informant for ethnographer William Anderson Taylor's work on Kāi Tahu history, and is credited as one of the midwives who paved the way for the creation of the Plunket Society of New Zealand.