Norman McLean, 1911 Encyclopædia Britannica, Volume 8… (1911)
“ An anti-patriarch had been appointed in the person of Abraham of Ḳartamīn, who insisted on the use of the phrase in opposition to the recognized authorities of the church. The council of bishops who met at Raḳḳa in the summer of 818 to choose a successor to Cyriacus had great difficulty in finding a worthy occupant of the patriarchal chair, but finally agreed on the election of Dionysius, hitherto known only as an honest monk who devoted himself to historical studies. ”
