 Though best known for his work on Shakespeare, Harbage's literary scholarship extended to his successors too; he did important work on a range of seventeenth-century figures.In this area, his books "Thomas Killigrew, Cavalier Dramatist 1612-1683" (1930), "Sir William Davenant, Poet Adventurer 1606-1668" (1935), and "Cavalier Drama" (1936) are noteworthy.For an overview of the field, his "Annals of English Drama 975-1700" (1964) is a compedium of original materials and a vital resource for scholarship.