
Andrew Duncan (Great Great Grandfather to Christopher Grace) landed at Whanganui by boat from Scotland in 1870. In 1881 his sons John and Andrew went to local Māori Iwi and offered to buy land. The family legend goes John asked to purchase land where the trees were the strongest, with the biggest berries and the Wood Pigeons were the fattest, this being strong farming land. Otairi was purchased sight unseen.
There was a gathering of the owners at a pa site on the Tutaenui Stream near Marton and John Duncan spoke for half an hour in fluent Māori to the 200 owners assembled so the purchase price could be divided fairly between the 7 chiefs for each hapu present.