The contents of Furness, home of Patrick and Louise Guinness at Naas, will be offered at Killashee Hotel in the Co Kildare town at 10.30am.
Patrick, son of Desmond and Mariga Guinness, is the president of the Irish Georgian Society and he is downsizing.
The 749 lots on the catalogue have been on view at the house since Saturday and seen by thousands of people. Online interest is heavy and auctioneers Fonsie Mealy are anticipating that this will be a particularly successful sale.
A clock by Francis Johnston, the Speaker’s Clock at the Irish Houses of Parliament, is estimated at €70,000-€90,000.
The Spirit of Justice by the Cork artist Daniel Maclise, whose sensational cartoon of the Battle of Waterloo is currently on display at the Royal Academy in London, is estimated at €50,000-€70,000.
The set of early 19th-century bagpipes, by family tradition used at Fenian ceremonies in West Cork, is estimated at €600-€800.
There is a magnificent Chippendale taste gilt wood over mantle mirror from the Carton House sale in 1943 (€30,000-€50,000) and Sir Thomas Wentworth’s helmet, sword and breastplate were purchased by the Guinness family at the dispersal sale at Castletown in the 1960s.
As Lord Deputy of Ireland in 1632-39 Wentworth, 1st Earl of Stafford, established authoritarian rule. His helmet is estimated at €2,500-€3,500.
There is enormous interest in a small bound pocket book with detailed plans and an elevation of Carlton House in London by architect Henry Holland which was a gift from the Prince of Wales to Thomas Connolly in 1789 (€8,000-€12,000).
The gilt wood harp owned by the late Derek Bel of The Chieftains is estimated at €1,500-€2,000.