Pocock, Lilian
Lilian Josephine Pocock (1883–1974) was a stained glass artist as well as a theatrical costume designer, book illustrator and watercolourist. She was the daughter of the painter Lexden Lewis Pocock. Her training included lessons from 1906 at the Central School of Arts & Crafts. There she was taught by Karl Parsons (1884-1934), who had himself been taught at the school by Christopher Whall (1849-1924). Pocock left in 1910 to become Parsons’ assistant.
Sources:
Lilian Pocock on Wikipedia
The Artists of the Glass House by Alan Brooks and Peter Cormack, The Journal of Stained Glass, Vol. XLI, 2017