Some account has been already given of scholastic opinion on presbyteral ordination to the diaconate and even to the priesthood.
St Jerome (Ep. 1 4 6) tells us that as late as the middle of the 3rd century the presbyters of Alexandria, when the see was vacant, used to elect one of their own number and without any further ordination set him in the episcopal office.
Gregory's ordination at Caesarea is historical.
V.) shows that in exceptional cases men were consecrated bishops without previous ordination to the priesthood.