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The1906 Dulwich by-election was aby-election held on 15 May 1906 for theBritish House of Commonsconstituency ofDulwich in South London.
The by-election was triggered by the resignation of the servingConservative PartyMember of Parliament (MP), DrFrederick Rutherfoord Harris, who was moving back to South Africa where he had previously lived for many years. TheUnionist candidate wasBonar Law, formerParliamentary Secretary to the Board of Trade who had lost his seat in the Liberal landslide in the Februarygeneral election. TheLiberal Party candidate wasDavid Williamson, who had also contested the February election.
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Conservative | Bonar Law | 6,709 | 55.3 | +3.9 | |
| Liberal | David Williamson | 5,430 | 44.7 | −3.9 | |
| Majority | 1,279 | 10.6 | +6.8 | ||
| Turnout | 12,139 | 79.4 | −5.1 | ||
| Conservativehold | Swing | +3.9 | |||
The Conservative majority increased by over 900 votes, which theTimes attributed not only to Bonar Law's candidature but also to the unpopularity of the Government's Education Bill, suggesting that the Catholic vote, estimated at 700, had gone mostly to the Conservatives as a result.
