The picture of the old house in Pandacan shows an open wide window at the front. It also has similarly sized windows at the other sides.

At night time, the window spaces were closed with sliding wooden panels with capiz shell panes. These window panels were very popular at that time. 

There were no screens yet, so we all slept under mosquito nets. I had not heard of the term "dengue" during those times.

What we used to hear were those scare stories of vampires hovering by the windows at night. ...