waymouth sold the property to annie quayle townend in 1905, who renamed it to mona vale after her mother's house in tasmania. she was the daughter of a wealthy canterbury run-holder, george moore of glenmark station. she was his only surviving daughter and he had bequeathed her one million pounds, apparently making her new zealand's richest woman at the time. townend added nine acres of land to the property and had a gate house built just off fendalton road. after the new zealand international exhibition, held in hagley park, finished in 1907, she purchased the exhibitions fernery including its plants and had it reassembled at mona vale. the present collection of ferns were supplied by landcare research in lincoln, the christchurch botanic gardens and the private collection of the late arthur ericson. townend also added the bathhouse to the property. she died in 1914.