Buddhism in Christendom - Jesus the Essene by Arthur Lillie 1887 Tertullian and the Doctrine of the Trinity, article in The Princeton theological review 1904 Dissertations on the Apostolic Age by JB Lightfoot 1892 The Filioque Controversy, article in The Church quarterly review 1877 Ecce Orienti - an epitome of the history of the ancient Essenes by MW Redding 1870 Dictionary of Sects and Heresies by JH Blunt 1874 A Brief Analysis of the Sects, Heresies, and Writers of the First Three centuries 1857 An historical view of heresies and vindication of the primitive faith by A McFarland 1806 An Inquiry into the Heresies of the Apostolic Age by Edward Burton 1829 The Angel-Messiah of the Buddhists, Essenes and Christians by Ernest De Bunson 1880 The Essenes: their History and Doctrines by Christian David Ginsburg 1864 Dictionary of Doctrinal and Historical Theology by John Henry Blunt 1870 Canonicity - a Collection of Early Testimonies to the Canonical Books of the New Testament by AH Charteris 1880 A Historical Introduction to the Study of the Books of the New Testament by George Salmon 1889 (THE FOURTH GOSPEL AND THE QUARTODECIMANS) Early Christian Doctrine by Leighton Pullan 1899 Historical Commentaries on the State of Christianity during the first 325 years, Volume 1, by JL Mosheim 1852 Historical Commentaries on the State of Christianity during the first 325 years, Volume 2, by JL Mosheim 1852 Heresy and Christian doctrine by E de Pressensé 1873 A Manual of the History of Dogmas, Volume 1 by BJ Otten 1917 A Manual of the History of Dogmas, Volume 2 by BJ Otten 1917 (Gnosticism, Modalism etc) A Religious Encyclopaedia or dictionary of Biblical, historical, doctrinal, and practical theology by JJ Herzog, Volume 1 1891 A Religious Encyclopaedia or dictionary of Biblical, historical, doctrinal, and practical theology by JJ Herzog, Volume 2 1891 A Religious Encyclopaedia or dictionary of Biblical, historical, doctrinal, and practical theology by JJ Herzog, Volume 3 1891 A Religious Encyclopaedia or dictionary of Biblical, historical, doctrinal, and practical theology by JJ Herzog, Volume 4 1891 (light scan, often hard to read) Unitarianism - its Origin and History 1890