Working out of doors, it soon became clear, was unsuitable. I must find a substitute for my customary habit of working directly from the subject. Photographs allowed me the luxury of hunkering down for the long haul, much as I had done with the still lifes, unaffected by changes in time, light, weather, seasons, or by low flying birds…. Eventually I came to treat the photograph as the subject, the source of inspiration rather than merely a source of information.