Follow this link to read an an interesting passage from Birge Harrison's book on Landscape Painting from nearly a hundred years ago. I own a copy of this book. I got it from my grandmother. It is interesting to for me to read books on painting from a long time ago. This book is especially interesting because it is written for a professional artist. Books on art now are mainly written for hobbyists. This passage on the subconscious servant talks about training your visual memory. It is interesting to hear from the voice of an traditional landscape painter before modernism started to emerge. I have enjoyed reading this book over and over for years. I had the chance to see one of his paintings in Atlanta in the Fall.