"After plunging them into water, he [Turner] dropped the colours onto the paper while it was wet, making marblings and gradations throughout.. .His completing process was marvellously rapid, for he indicated his masses and incidents, took out half-lights, scraped out high-lights and dragged, hatched and stippled until the design was finished. This swiftness, grounded in the scale practice in early life, enabled Turner to preserve the purity and luminosity of his work, and to paint at a prodigiously rapid rate."