[6] After their father died in October 1900[7] four of the six sons moved away from Ōkārito and the youngest, Alec and Peter, remained at the Waiho / Waiau farm.
[10][11] The family atmosphere generated by Isabella, who died in 1918,[12] followed by Jim's wife and then widow Rose, in addition to the Graham brothers' guiding and climbing expertise, gave the 120-guest hotel a special character that became world-renowned.
[15] The Canterbury Aero Club made open cockpit taxi flights bringing international climbers and tourists from Christchurch.
With the leadership of Bert Mercer the Graham family[16] founded what became Air Travel (NZ) Ltd to provide a regular passenger service to Waiho in a fully enclosed aircraft, Fox Moth ZK ADI, which began operations in December 1934.
[21] In the 1956 Queen's Birthday Honours, Peter Graham was appointed a Member of the Order of the British Empire, in recognition of his services as a mountaineer and alpine guide.
[22] Peter Graham had an interest in New Zealand alpine botany, sending plant specimens to Donald Petrie[23] and taking botanists such as H.H.