The Augustinian Correspondence Database (ACDb) contains all intertextual references found in the the editions of Alois Goldbacher, Klaus-Detlef Daur and Johannes Divjak. These references were not only counted but analyzed in many ways. In different sheets you find the frequency of references sorted by content and scale of identifiability, a list of all references mentioned by Goldbacher, Daur and Divjak, a list of all indication of sources Augustine uses, statistical records of all indications of source and terms of communication Augustine uses, a list of all repeated references within a letter, rankings among the correspondence of Augustine concerning the word-length, the total number of references and the frequency of repeated references within a letter, a list of all references used or omitted by Daur, a list and the frequency of all abbreviations used in the database and a list of all literature used by creating the database.