 Griffiths himself, and likely his wife Isabella Griffiths, contributed review articles to the periodical.Later contributors included Dr. Charles Burney, John Cleland, Theophilus Cibber, James Grainger, Anna Letitia Barbauld, Elizabeth Moody, and Tobias Smollett—who would go on to establish the "Monthly"'s competitor in 1756, "The Critical Review".William Kenrick, the "superlative scoundrel", was editor from 1759 to 1766.