...an instructive example of the manner in which an unpretending subject can be dignified by sound craftsman and artistic resource. The artist's quietly confident draftsmanship and agreeable management of subdued yet effective colour give significance to a piece of work which in less able hands might easily have been trivial
His work as a stained glass artist was described in Modern Glass by Guillaume Janneau as:[9]
The London artist has a remarkable gift for dramatic design. His "lead" outlines, which skilfully enhance the colours they frame, participate with amazing certainty in the general movement of the composition
to me this window is more than an unusually beautiful creation. It unfolds its message with a heartfelt prayer
His later glass work was executed by James Powell and Sons.[16] In 1930, he presented The Future of Stained Glass at the Exposition internationale des arts décoratifs et industriels moderne.[17]
In 1939, Walker was selected as one of the artists to work on the National Gallery's project "Recording Britain:the changing face of Britain" established by Sir Kenneth Clark, with "Foundling Hospital, London" being one of his contributions.[18][19]
He was elected the Master of the Art Workers' Guild in 1950,[5] previously being Master of the Junior Art Workers' Guild in 1905.[20] Walker was married to fellow artist Aileen Hollely[21] and his uncle was Frederick Walker.[22]
In 2014, the Stained Glass Museum, Ely, held an exhibition of Walker's work.[23]