He is now best remembered for his scathing 1923 review of T. S. Eliot's "The Waste Land", and for his book "Style" (1955; revised 1962), an acclaimed guide to recognising and writing good prose. His "Tragedy in Relation to Aristotle's 'Poetics (1927, substantially revised in 1957) was for over fifty years a standard introduction. His most important contribution to scholarship was his four-volume old-spelling "Complete Works of John Webster" (1927), the first collected edition of the Jacobean dramatist since that of Hazlitt the Younger (1857), itself an inferior copy of Dyce (1830). Eliot called Lucas "the perfect annotator", and subsequent Webster scholars have been indebted to him, notably the editors of the new Cambridge Webster (1995–2007).