We went to the City Art Centre to see an exhibition of photos taken by Edwin Smith in the 1950s and 60s along with current photos of the same scene by Colin McLean. It was very interesting as the early ones showed how much air pollution there was from coal fires, but also how little had changed in the New Town. I preferred the old photos in many ways because the new ones had been over processed to my eyes with too much contrast. Edwin Smith tended to prefer cloudy skies whereas Colin McLean likes sunny days. Alternatively perhaps the weather is better now. Afterwards we walked down to Princes Street where the blip was taken as someone was taking a picture my way.