Lisney director Peter Kieran is staying mum about the identity of what sounds like an exceptionally fine mansion on the Dublin/Kildare border which he is currently offering for sale by private treaty. He recently placed an advertisement in The Irish Times inviting wealthy punters "with £3.5 million to spend" to contact him about the house which stands on 15 acres within easy access of Dublin city and the M50. "A home beyond your wildest dreams," the ad said. "Private gardens, grounds and paddocks. Gate lodge in exclusive country setting." Sounds the ideal place for a house-builder who has made a fortune out of the property boom.