Simpson, Percy, review of Ben Jonson, Underwoods, in Modern Language Review, 1.3 (1906), pp. 251–52, doi:10.2307/3713620

Simpson, Percy, ‘"Deep Pathaires" (Arden of Feversham, III, V, 51)’, in Modern Language Review, 1.4 (1906), pp. 326–27, doi:10.2307/3713457

Simpson, Percy, ‘Miscellaneous Notes: An Allusion in Webster’, in Modern Language Review, 2.2 (1907), pp. 162–63, doi:10.2307/3713312

Simpson, Percy, ‘"Tanquam Explorator": Jonson's Method in the "Discoveries"’, in Modern Language Review, 2.3 (1907), pp. 201–10, doi:10.2307/3713081

Simpson, Percy, ‘The Authorship and Original Issue of "Cinthia's Revenge"’, in Modern Language Review, 2.4 (1907), pp. 348–50, doi:10.2307/3713662

Simpson, Percy, review of Ben Jonson, Florence May Snell, A Tale of a Tub by Ben Jonson, in Modern Language Review, 11.4 (1916), pp. 474–77, doi:10.2307/3712779

Simpson, Percy, ‘Horatio and the Ghost in "Hamlet." A Side-Note on the Current Controversy’, in Modern Language Review, 13.3 (1918), pp. 321–22, doi:10.2307/3714234

Simpson, Percy, review of William Edward Selim, The Case Is Altered, by Ben Jonson, in Modern Language Review, 14.1 (1919), pp. 114–16, doi:10.2307/4623447

Simpson, Percy, review of Frederick S. Boas, The Tragical History of Doctor Faustus, in Modern Language Review, 28.3 (1933), pp. 379–84, doi:10.2307/3715385

Simpson, Percy, ‘Thomas Middleton's "Women Beware Women"’, in Modern Language Review, 33.1 (1938), pp. 45–46, doi:10.2307/3715804

Simpson, Percy, ‘Ben Jonson and the Devil Tavern’, in Modern Language Review, 34.3 (1939), pp. 367–73, doi:10.2307/3717698

Simpson, Percy, review of Charles Francis Wheeler, Classical Mythology in the Plays, Masques, and Poems of Ben Jonson, in Modern Language Review, 34.3 (1939), pp. 435–36, doi:10.2307/3717713

Simpson, Percy, review of Ben Jonson, Kathryn Anderson McEuen, Classical Influence upon the Tribe of Ben, a Study of Classical Elements in the Non-Dramatic Poetry of Ben Jonson and His Circle, in Modern Language Review, 35.3 (1940), pp. 389–90, doi:10.2307/3716642

Simpson, Percy, ‘The Rhyming of Stressed with Unstressed Syllables in Elizabethan Verse’, in Modern Language Review, 38.2 (1943), pp. 127–29, doi:10.2307/3716703

Simpson, Percy, ‘The Castle of the Rosy Cross: Ben Jonson and Theophilus Schweighardt’, in Modern Language Review, 41.2 (1946), pp. 206–07, doi:10.2307/3717040

Simpson, Percy, ‘A Modern Fable of Æsop’, in Modern Language Review, 43.3 (1948), pp. 403–05, doi:10.2307/3716769

Simpson, Percy, review of Allan H. Gilbert, The Symbolic Persons in the Masques of Ben Jonson, in Modern Language Review, 45.2 (1950), pp. 241–43, doi:10.2307/3719451

Simpson, Percy, ‘Miscellaneous Notes: The Elizabethan Pronunciation of Accented Greek Words’, in Modern Language Review, 45.4 (1950), pp. 509–10, doi:10.2307/3718958

Simpson, Percy, ‘Francis Beaumont's Verse-Letter to Ben Jonson: "The Sun, Which Doth the Greatest Comfort Bring..."’, in Modern Language Review, 46.3 (1951), pp. 435–36, doi:10.2307/3719351