In 1967, aged 19, Tim Shadbolt (bottom, second from right) worked on the Manapōuri scheme. His description of tunnelling and those who did it was published in 1971, in Bullshit and jellybeans, and can be downloaded here.
Te whakamahi i tēnei tūemi
Private collection, Tim Shadbolt
Tāpiritia te tākupu hou