Under each period special collections of available sources are to be found. The student is not given any bibliography of works bearing on the topics, but is referred to the following accessible works of reference of recent date for additional information and bibliographies:

The New Schaff-Herzog Encyclopaedia of Religious Knowledge, edited by S. M. Jackson, New York, 1908-12.

The Catholic Encyclopaedia, New York, 1907-12.

The Encyclopaedia Britannica, eleventh edition, Cambridge, 1910.

The Encyclopaedia of Religion and Ethics, edited by J. Hastings, Edinburgh and New York, 1908 ff. (In course of publication.)

For the patristic writers, their lives, works, editions, and other bibliographical matter, see:

G. Krueger, History of Early Christian Literature in the First Three Centuries, English translation by C. R. Gillett, New York, 1897. Cited as Krueger.

B. Bardenhewer, Patrologie, Freiburg-i.-B., 1911, English translation of second edition (1901) by T. J. Shahan, St. Louis, 1908. Cited as Bardenhewer.

In addition to the encyclopaedias the following are indispensable, and should be consulted:

Smith and Wace, Dictionary of Christian Biography, Literature, Sects and Doctrines, London, 1877-87. (The Condensed Edition of 1911 by no means takes the place of this standard work.) Cited DCB.

Smith and Cheetham, Dictionary of Christian Antiquities, London, 1875-80. Cited DCA.

Advanced students and those capable of using French and German are referred to the following, which have admirable and authoritative articles and ample bibliographies:

Realencyclopaedie fuer protestantische Theologie, edited by A. Hauck, Leipsic, 1896 ff. Two supplementary volumes appeared in 1913. Cited PRE.

Kirchenlexicon oder Encyclopaedie der katholischen Theologie und ihrer Hilfswissenschaften, second edition, by J. Hergenroether und F. Kaulen, Freiburg-i.-B., 1882-1901. Cited KL.

Dictionnaire de Theologie Catholique, edited by A. Vacant and E. Mangenot, Paris, 1903 ff.

Dictionnaire d'Archeologie Chretienne et de Liturgie, edited by F. Cabrol, 1903 ff.

Dictionnaire d'Histoire et de Geographie Ecclesiastiques; edited by A. Baudrillart, A. Vogt, and U. Rozies, Paris, 1909 ff.

Collections of sources in the original languages, easily procured and to be consulted for texts and to some extent for bibliographies:

C. Mirbt, Quellen zur Geschichte des Papsttums und des roemischen Katholizismus, third edition, Tuebingen, 1911. Cited as Mirbt.

C. Kirch, S. J., Enchiridion fontium historiae ecclesiasticae antiquae. Freiburg-i.-B., 1910. Cited as Kirch.

H. Denziger, Enchiridion symbolorum, definitionum et declarationum de rebus fidei et morum, eleventh edition, edited by Clemens Bannwart, S. J., Freiburg-i.-B., 1911. Cited as Denziger.

A. Hahn. Bibliothek der Symbole und Glaubensregeln der alten Kirche, third edition, Breslau, 1897. Cited as Hahn.

G. Krueger. Sammlung ausgewaehlter kirchen und dogmengeschichtlicher Quellenschriften, Freiburg-i.-B.

Of this useful collection especially important are the following of more general application:

E. Preuschen, Analecta: Kuerzere Texte zur Geschichte der alten Kirche und des Kanons, second edition, 1909-10.

F. Lauchert, Die Kanones der wichtigsten altkirchlichen Concilien nebst den apostolischen Kanones.

R. Knopf, Ausgewaehlte Maertyreracten. Cited as Knopf.

Other volumes are cited in connection with topics.

H. T. Bruns, Canones apostolorum et conciliorum saeculorum IV, V, VI, VII, Berlin, 1839. Cited as Bruns.

Although not source-books, yet of very great value for the sources they contain should be mentioned:

J. C. L. Gieseler, A Text-Book of Church History, English translation, New York, 1857.

K. R. Hagenbach, A History of Christian Doctrines, English translation, Edinburgh, 1883-85.

C. J. Hefele, Conciliengeschichte, Freiburg-i.-B., 1855-70. Second edition, 1873 et seq. A new French translation with admirable supplementary notes has just appeared. The English translation (History of the Councils), Edinburgh, 1876-95, extends only through the eighth century. Cited as Hefele.