Keith Shackleton quotes:

Keep a record of every picture you paint, have them photographed and write down where they went. Some day, when one reaches a great age, there will be calls for a Retrospective Exhibition of a life's work.

I would warn very sincerely against the pitfalls of copying photographs. A frozen, split-second bears little relationship to the continuing process of living reality. It is better to look, look again, and keep on looking.

A good landscape painting is not just a demonstration of competent application of paint. It must offer a feeling of homage to the subject.