Here is one of the photographs from Walker Evans' documentary portraits. I find this particular photograph interesting because as first glance, this photograph looks prosaic. Only after looking at it for a while that I start to see the mystery of this photograph. Who are the two people in the photograph? What are their relationship? What is inside the house? Photographs are supposed to be the 'all-seeing eye'. But in Walker Evans' works, the things that a photograph cannot capture is highlighted instead.