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Joseph "Pentland" Firth (25 March 1859 – 13 April 1931) was a New Zealand educator and cricketer. He was the headmaster of Wellington College from 1892 to 1920. He was born and died in Wellington, and played first-class cricket for Wellington and Nelson in the 1880s. He was New Zealand's representative on the International Olympic Committee from 1923 to 1927.