These influential lectures are still an important resource for the study of early Christian heresies.

Preface; Lecture 1; Lecture 2; Lecture 3; Appendices; Index.

F. Crawford Burkitt (1864-1935) was Norrisian Professor of Divinity at the University of Cambridge from 1905-35. His other publications include Evangelion da-Mepharreshe (1904), The Gospel History and Its Transmission (1906), and Earliest Sources for the Life of Jesus (1910). He was elected to the British Academy Fellowship in 1905.