I do think that I ought to terminate this agony by saying that the flying rose pergola was - according to the Venerable Fred Jane - designed in 1905/06 by John William Dunne and, in 1909/10, was constructed at Leysdown by the combined talents of Eustace & Oswald Short, Prof. Huntington and Mr Dunne. Reputedly it was the first inherently stable aeroplane. I wonder what became of it. Oh yes, I should have mentioned that it's the Dunne-Huntingdon of 1910.