Buck did well at Otago Medical School, where he also succeeded in sport, becoming national
long jump champion in 1900 and 1903. He completed his
MB ChB in 1904, and an
MD six years later. His doctoral thesis, completed in 1910, was titled
Medicine amongst the Maoris in ancient and modern times. During this time, in 1905, he married Irish-born Margaret Wilson. Their long marriage was often fiery, but was strong, and it was Margaret who often gave the impetus to Peter's career. In November 1905, Buck was appointed as a medical officer to Māori, working under
Māui Pōmare, initially in the southern
North Island, then in the far north. Between them, Pōmare and Buck campaigned successfully to improve sanitation in the small Māori communities around the country.
Parliament and war , circa 1930 In 1909,
Hōne Heke Ngāpua,
Member of Parliament for
Northern Maori died suddenly. Buck was singled out by Native Minister
James Carroll to be his replacement. Buck accepted and was elected in the
subsequent by-election. He became a member of the Native Affairs Committee. He did not seek re-election to the seat in
1914, but stood for the
Bay of Islands electorate, where he lost by a narrow margin. By this time, Buck had developed an interest in Pacific Island peoples, working briefly as a medical officer in both the
Cook Islands and
Niue during parliamentary breaks. During the
First World War, Buck helped in the recruitment of a Māori volunteer contingent. Buck joined this contingent as medical officer, travelling to the Middle East in 1915. He took part at
Gallipoli, later being awarded a
Distinguished Service Order for his heroism. He later saw action in France and Belgium, before being posted to the No 3 New Zealand General Hospital at
Codford,
England, in 1918. Returning to New Zealand, Buck was appointed as Chief Maori Medical Officer, and in 1921 was named director of the Maori Hygiene Division in the Department of Health. Buck participated in the
1919–1923 Dominion Museum ethnological expeditions alongside
Elsdon Best,
James McDonald,
Johannes Carl Andersen and
Āpirana Ngata. == Bishop Museum ==