Relative productivity

When [Gordianus] reluctantly accepted the purple, he was above fourscore years old; a last and valuable remains of the happy age of the Antonines, whose virtues he revived in his own conduct, and celebrated in an elegant poem of thirty books. With the venerable proconsul, his son, who had accompanied him into Africa as his lieutenant, was likewise declared emperor. His manners were less pure, but his character was equally amiable with that of his father. Twenty-two acknowledged concubines, and a library of sixty-two thousand volumes, attested the variety of his inclinations; and from the productions which he left behind him, it appears that the former as well as the latter were designed for use rather than for ostentation [19]. DF, i, 195.

19. By each of his concubines, the younger Gordian left three or four children. His literary productions, though less numerous, were by no means contemptible.