These two books were on my desk yesterday; among others but they took my attention with such lovely covers. They were designed by Ethel Larcombe (1897- 1965) I know little about her except that she was influenced by the illustrations of Walter Cranes and Kate Greenaway. However, it was sometime later when introduced to the publications of William Morris that she dropped her medieval style and adopted that of the arts and crafts movement and influenced by Burne Jones and Rossetti.   

Her art nouveau designs won many competitions and brought her to the atttention of Talwin Morris who commissioned her to design bookbindings for Gresham one is seen here.  The other one I thought was by Talwin Morris ; but her style is considered a little busier.

Although the books were on my desk … I gleaned this information from Treasures of the GSA Library