Tyconius Afer, a Donatist of the latter half of the fourth century, was an influential figure in the struggle between the Donatist and Catholic Churches in Africa and writer of at least two important exegetical works: the Book of Rules, published in 1894 in the third volume Texts and Studies by F. C. Burkitt and the Commentary on the Apocalypse here restored in a critical text by the late Francesco Lo Bue. Tyconius' Commentary is generally thought to survive only in the work of other writers but it is Dr Lo Bue, using critical techniques, who can be said to have restored something like the original text and, what is more, to have proved the ascription to Tyconius beyond reasonable doubt.