“Our artist, on hot, hotter, hottest afternoon in July, after a mild claret punch under the trees, dreams that a Swiss chalet sort of roof like the above would look rather nobby on the little Bow Window to the library”
From the 1879 guestbook. The bay window and the library (it would cease to be the library in 1893, when the present library was added) are on the second floor at the south end. The bay window is a simple one, in keeping with the classical lines of the rest of the house. It looks exactly like the window in the sketch, minus the Swiss chalet top which was Not added! The question is, ‘nobby’ is that a good or bad adjective?
Acair Fearann 
nobby is intended to be, I think, a good adjective. Fortunately, it would appear that the mild (?) claret punch wore off before the plan was taken any further…