It is interesting though when he comes to the empty streets in old photo's in the 1800's he keeps talking on how it's like the cities are empty or abandoned. The fact is he missed a huge answer, it was Sunday when the pictures were taken and everyone and I mean everyone was at church since that was basically mandatory and for most of the day in many cases so the people are existent. You just have take a picture on a Saturday since weekdays unlike modern times everyone back then worked, no get rich quick schemes or a common man investing in the stock market you worked or you starved.