Christina Stapley is a retired medical herbalist with ten years of practice. She now teaches pharmacognosy, materia medica and the history of western herbal medicine. Christina is a member of the Herbal History Research Network, and for many years has tutored practical historical herb workshops. She is a Royal Horticultural Society lecturer and has written three books on growing and using herbs. Christina has written courses on ageing successfully with herbs and edited a book of 17th century cookery and medicinal recipes.