Fourth Division.

[Hitherto the order followed in the arrangement of the letters has been the chronological. It being impossible to ascertain definitely the date of composition of thirty-nine of the letters, these have been placed by the Benedictine editors in the fourth division, and in it they are arranged under two principal divisions, the first embracing some controversial letters, and the second a number of those which were occasioned either by Augustin's interest in the welfare of individuals, or by the claims of official duty.]