Is that the observatory / lookout building's original roof? I visited it about 30 years ago and my memory is of a black, domed roof. Age and the drink undoubtedly affect memory, but my recollection seems quite clear (to me

). Sadly, I didn't take any photos at the time.
My chart's on board, but looking at the on-line C-map version courtesy of Shipfinder shows the building marked as "Cup" - maybe short for cupola? (I can't find it listed on the C-map Chart Legend pdf.) Another, maybe less reliable, bit of evidence is the fact that all of the Stevensons' light houses have domed roofs. Then again, the temporary barracks structures on the rock construction sites had conical roofs...
Am I just havering or can anyone confirm?