Before Mr Justice Shearman, Reginald Dunne and Joseph O’Sullivan were both tried together for the murder of Sir Henry Wilson on 2 July 1922. Dunne stood with his arms folded while the charge was being read while O’Sullivan stood stiffly at attention. When Dunne was asked, “Are you guilty or not guilty?” he replied “I admit shooting Sir Henry Wilson.” “Are you guilty or not guilty of the murder?” the Clerk of Arraigns repeated. “That is the only statement I can make,” was the response. O’Sullivan made a similar reply and after some discussion the plea was treated as one of “Not guilty.”
Towards the end of the trial, which lasted just three hours, the defence Counsel handed the judge a double sheet of blue official paper given to him by Dunne. After perusing the contents Mr Justice Shearman said - “I cannot allow this to be read. It is not a defence to the jury at all. It is a political manifesto…I say clearly, openly, and manifestly it is a justification of the right to kill.”
It was never really established whether Dunne and O’Sullivan acted on their own (the assassination seemed pretty badly organised for an official assassination so this was likely) or with the approval and help of Michael Collins. Collins had been a friend of Dunne’s while Sir Henry Wilson was responsible for establishing the Cairo Gang (a group of experienced British Intelligence agents who met frequently at Dublin’s Cairo Cafe) twelve of whom were murdered by the IRA acting under Collins command in 1920. The Cairo Gang killings provoked the British Auxiliaries in Dublin to shoot trapped innocent civilians at Croke Park in not the bloodiest but perhaps the nastiest of the various historical Bloody Sundays.
Perhaps the ironic aspect to the story of the murder of Sir Henry Hughes Wilson was that Reginald Dunne and Joseph O’Sullivan were both born and bred in London, whereas Field-Marshall Wilson was born smack bang in the middle of Ireland at Ballinalee in County Longford.
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