Paul George Konody,
Dictionary of National Biography…
(1912)
“ In later life Shields neglected that illustrative work for which his gifts eminently fitted him, and devoted himself to more ambitious decorative designs and oil-painting, in which he followed the lead of the Pre-Raphaelites without showing a trace of their romanticism. He was not a great colourist but a sound draughtsman. His later work is cold, formal, didactic and out of touch with actual life, though it is not lacking in loftiness of aim and nobility of design. ”
