Marcus The Heretic (sometimes confounded with MARCUS THE HERESIARCH), a native of Memphis, in Egypt, flourished in the 4th century. He is said by Isidore of Seville, and Sulpicius Severus in Hist. Sacra, to have been a skillful magician — a Manichaean, perhaps personally a disciple of Manes, and the originator of the doctrine of the Priscillianists. SEE PRISCILLIANISTS. He traveled to Spain, and is said to have disclosed his doctrines to Elpidius, a rhetorician, and to his wife Agape; from them the doctrines were communicated to Priscillian, SEE PRISCILLIAN, who, by embodying them in systematic form and giving them spread, became the founder of the sect. — Smith, Dict. of Greek and Roman Biog. and Mythol. s.v.; Neander, Ch. Hist. 2:710.
The Cyclopedia of Biblical, Theological, and Ecclesiastical Literature was edited by John McClintock and James Strong. It contains nearly 50,000 articles pertaining to Biblical and other religious literature, people, creeds, etc. It is a fantastic research tool for broad Christian study.
John McClintock was born October 27, 1814 in Philadelphia to Irish immigrants, John and Martha McClintock. He began as a clerk in his father's store, and then became a bookkeeper in the Methodist Book Concern in New York. Here he converted to Methodism and considered joining the ministry. McClintock entered the University of Pennsylvania in 1832 and graduated with high honors three years later. Subsequently, he was awarded a doctorate of divinity degree from the same institution in 1848.WikipediaRead More