Horace Henry Ayres(31 July 1912 – 16 July 1987), better known as Harry Herbert Ayres and with his surname sometimes spelled Ayers, was a well-known New Zealand mountaineer and guide.
Horace Henry Ayres
31 July 1912
|Died||16 July 1987|
|Spouse(s)||Catherine May Guise (1939–1948), Jeanne Ette Cammock (1949–1987)|
Ayres was born in Christchurch, New Zealand, on 31 July 1912 to Ellen Matthews and Henry Ayres. He left school at the age of 12 after his mother died. He then worked on some farms, railroads and roadways.
In 1931, Ayres was introduced to mountaineering by Frank Alack. After five years, Ayres became a guide at the Tongariro National Park. In 1937, he made his first ascent of Aoraki / Mount Cook. He later became the chief ranger at the Mount Cook National Park Board. Ayres was a mentor to Edmund Hillary, who had proposed him to Eric Shipton as a member of the 1953 British Mount Everest expedition.
He fought in WWII in the Pacific from 1942-1944 where he contracted tropical diseases that affected his health significantly. 
In 1956, Ayres traveled to Antartcica with the New Zealand party of the Trans-Antarctic Expedition.
He married Catherine May Guise in 1939. In 1948 they divorced and he married Jeanne Ette Cammock in 1949. They had three children. In 1987, Ayres went missing to be found drowned in Lyttelton Harbour / Whakaraupō from expected suicide.
- Langton, Graham. "Horace Henry Ayres". Dictionary of New Zealand Biography. Ministry for Culture and Heritage. Retrieved 23 April 2017.
- Gill, Michael (2017). Edmund Hillary: A Biography. Nelson, NZ: Potton & Burton. pp. 83–89. ISBN 978-0-947503-38-3.
- "No. 48469". The London Gazette (3rd supplement). 31 December 1980. p. 40.