 Her home was in Blakeney, Norfolk.Cecil Leslie illustrated the Puffin editions of the classic "Heidi" (1956) and E. Nesbit's "The Story of the Treasure Seekers" (1958), "The Wouldbegoods" (1958) and "The Enchanted Castle" (1964).She also illustrated many of Pauline Clarke's books, including the Carnegie Medal winner, "The Twelve and the Genii", and several other children's books by Rose Fyleman and Alison Uttley, among others.