Illusion in an old photo

I found this picture on a discussion thread and it was so good I wanted to share it. It was initially posted by a man called Dean Terry.

Take a look. What do you see in the picture?

Do you see a man and a woman with a large face of a bearded man between them?

Or do you see a child sitting on the man's knee, dressed all in white, with a large white hat over his face?

You can see the picture in a larger size by clicking here.