In 1748 Dr. Morell re-edited King's Euripides, subjoining a fourth play, the Alcestis. Dr. Morell also published the Prometheus Vinctus of Aeschylus, with an English poetical version, accompanied also with various readings and notes. He edited too, the Philoctetes of Sophocles, with Scholia, and notes, and subjoined a few notes to a 4to. edition of all Sophocles's Plays: various other pieces were published by him: but his most famous and most useful work, was his Thesaurus Graecae Poeseus, sive Lexicon Graeco-prosodiacum, first published at Eton, after the manner of the Latin Gradus ad Parnassum, first published at Eton, in 1762. An improved and greatly enlarged edition of this valuable work, is just published by the learned Dr. Maltby.