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Side elevation, signed and dated Mar 1801, sold by Adam's at Slane Castle, 6 Oct 2009, Lot 496 (illus. in sale catalogue; 'A letter from Francis Johnston', BIGS 6 (no. 1), Jan-Mar 1963, 3; 'A letter from Francis Johnston', BIGS 6 (no. 1), Jan-Mar 1963, 3; information from Caroline Treffgarne in letter to A. Rowan, 30 Oct 1993, citing 'drawing by Johnston of his 1803 alterations' found by Mrs Barrington-Manuel when she inherited the house from her cousin, a Miss Bligh; Christine Casey & Alistair Rowan, The Buildings of Ireland: North Leinster (1993), 445-6
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