Table:
text: New Zealand general election, 1951
Results
Electorate results for the New Zealand general election, 1951
Electorate Incumbent Winner Majority Runner_up
North Dunedin Robert Walls Robert Walls 307 Cameron
North Shore Dean Eyre Dean Eyre 2155 Wrathall
Oamaru Thomas Hayman Thomas Hayman 1315 Ryan
Onehunga Arthur Osborne Arthur Osborne 1966 Bradley
Onslow harry Combs harry Combs 1106 Meadowcroft
Otahuhu Leon Götz Leon Götz 2128 James Deas
Otaki James Joseph Maher James Joseph Maher 1142 Holloway
Pahiatua Keith Holyoake Keith Holyoake 4598 Jones
Palmerston North Blair Tennent Blair Tennent 200 Joe Hodgens
Parnell Duncan Rae Duncan Rae 1587 Walt
Patea William Sheat William Sheat 2467 Finer
Petone Michael Moohan Michael Moohan 2135 Croft
Piako William Goosman William Goosman 6364 Kenah
Ponsonby Ritchie Macdonald Ritchie Macdonald 1504 Dempsey

Question: Who was the incumbent when Arthur Osborne won the 1951 New Zealand general election?