That's interesting. On another matter can I ask; Did she photograph much in the middle of the day? A few of her images seem shot this way to me. There's some very hard sky. That's not a criticism but its quite different for a landscape photographer.
She shot images when ever she saw them, some in the middle of the day. The image of a statue of a lion at Chatsworth was taken early in an afternoon when we were on a field trip.
As I commented earlieras her photography matured with experience her exposures, printing techniques etc improved very significantly and her work became much more tonal.
Ian
