Helmet & Cowl by W. M. & M. F. S. Letts (Wells Gardner, Darton & Co. Ltd, 1913) with dustwrapper D B Derbyshire Bookseller Posted on October 2, 2020 Posted in Books Tagged with Books, Children's Books, Early Dustwrappers, Illustrated, Stephen Reid, Winifred Mabel Letts Just added… Helmet & Cowl.