Chatham Islands Radio: Superintendent, from 26 February 1933 to November 1940.
Mr McMahon, his wife and two children, were returning to New Zealand aboard the steamer Holmwood when it was attacked and sunk by German raiders in November 1940.
Chatham Islands Radio: Superintendent, from 26 February 1933 to November 1940.
Mr McMahon, his wife and two children, were returning to New Zealand aboard the steamer Holmwood when it was attacked and sunk by German raiders in November 1940.