Dogged by an Unanswered Question

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The main entrance to Killinardrish, County Cork. In 1837 Samuel Lewis’ Topographical Dictionary of Ireland describes the house as being ‘an elegant Italian lodge, lately built by R. J. O’Donoghue, Esq.’ While still in the hands of Mr O’Donoghue’s children, late 19th and early 20th century photographs show the entrance without its present limestone pedimented and pillastered frame which clearly dates from the 1700s. It must therefore have been added after the death of the last member of the O’Donoghue family in January 1934, but when and by whom? The house was subsequently occupied for a period by one of the Ryes whose own home just a few miles away, Ryecourt, was burnt out in 1921 like so many others in this part of the country. Might the door surround have been salvaged from 18th century Ryecourt and installed at Killinardrish? Any assistance with solving this puzzle would be much appreciated.