Detail from a portrait by Lady Clementina Hawarden (1822-1865), the daughter of an English Aadmiral and wife of Cornwallis Maude, the 4th Viscount Hawarden who had an estate, Dundrum House in Co Tipperary. The collection is for sale at Bonhams, London, for £100,000-£150,000.

On Tuesday , in London, Bonhams will auction photographs described as “an exceptional archive of images, many previously unrecorded, by o(...)