Margery Gill (1925 - 2008) was an illustrator of children's books noted for her realistic illustrations of children. She illustrated a wide range of authors and would often go to the place a book was set to get a feel for it, somthing that led to her illustrating a german translation of Swallows and Amazons. I enjoyed this picture story from the Guardian which has a bit more abotu her life and some of the books she illustrated.