Mr Haughey, who has been fighting prostate cancer for a number of years, was rushed to Mater Private Hospital, when family became concerned with his deteriorating condition.
The 80-year-old former statesman, nicknamed The Squire, was back in the media limelight, last week, when the Moriarty Tribunal has heard that he had settled tax liabilities due to the Revenue Commissioners in 2003 for £3.94m, despite the fact that the Revenue had assessed his liabilities at £5.5m.
An initial offer of £2m from Mr Haughey’s agents was rejected by Revenue as was another offer of £3.85m in October 2002.
However, a final figure of £3.94m or €5m was eventually agreed and later settled by Mr Haughey in March 2003.
Mr Haughey was diagnosed with cancer in 1995 and has been admitted to hospital a number of times since.
Because of this condition, the Moriarty Tribunal agreed in 2001 that Mr Haughey would no longer be required to give evidence. He was able, however, to spend time sailing in the south of France around this time
The source of Mr Haughey’s wealth had always been mystifying. He came from a poor background and lived in a council house. But in 1969, after a decade as a government minister, never earning more than £5,500 (€6,984) per annum, he bought one of the grandest houses in Ireland, Abbeville, a 10-bedroom Georgian mansion on the outskirts of Dublin on 270 acres.