 Her wax cylinder recordings survive in the archives at the St. Fagan's National History Museum in Cardiff, National Museum Wales, and at the British Library.Other materials relating to Lady Herbert Lewis are at Bangor University, the National Library of Wales and Flintshire Record Office.Both of her children, Kitty Lewis (Mrs. Idwal Jones) and Dr. Herbert Mostyn Lewis, would carry on her work and serve terms as president of the Welsh Folk-Song Society.