Vigilantius and His Times by William S Gilly and published by Classics.
The object of this book is to illustrate the ecclesiastical errors and corruptions of the fourth century, and to show what sort of opposition was made to them. The author believes that many of those innovations, which have been called a development of Church principles, in regard to doctrine and discipline, were departures from the purer Christianity of the Church of the Apostles.
William Gilly believes also that the calumniated presbyter, Vigilantius, was one of those witnesses, who have been raised up from time to time by divine grace, to bear testimony to the truth, and to be the links of its continuity through ages of rebuke and darkness.
This work was written to expose unBiblical Roman Catholic practises, which called forth one of the most violent of St Jerome's polemical treatises. Vigilantius was especially indignant agains the veneration of saints and their relics, and argued against the vigils in the basilicas of the martyrs.