to found the monastery and establish the church which was ultimately to embrace in its jurisdiction the whole of Scotland north of the Firths of Forth and Clyde, to be for a century and a half the national church of Scotland, and to give to the Angles of Northumbria the same form of Christianity for a period of thirty years. The buildings that now remain are of much later date, but it may be inferred that in its constitution, spirit, and work the Columban Church was not isolated, but was in reality a mission from the Irish Church, formed an integral part of it, and never lost its connection with it. The principal buildings were constructed of wood and wattles, and were originally (1) a monastery with a small court, on one side of which was the church, with a small side chamber, on a second side the guest-chamber, on the third a refectory, and on the fourth dwellings of the monks; a little way off on the highest part of the ground were (2) the cell of St. Columba, where he sat and read or wrote during the day, and slept at night on the bare ground with a stone for his pillow; and (3) various subsidiary buildings, including a kiln, a mill, a barn, all surrounded by a rampart or rath. Not far off was a sequestered hollow (Cabhan cuildeach) to which Columba retired for solitary prayer. The mill has left its traces in the small stream to the north of the present cathedral ruins, and remains of old causeways may be traced from the landing places of Port-na-martir, Port-Ronan, and Port-na-muintir. All the early buildings, except the kiln, were of wood; the guest-chamber was wattled, Columba's cell was made of planks, and the church was of oak. The members of the community were termed brethren, and were addressed by Columba as familia or chosen monks. They consisted of three classes: (1) the older brethren, who devoted themselves to the religious services of the church, and to reading and transcribing the Scriptures; (2) the younger and stronger working brothers, who devoted themselves to agriculture and the service of the monastery; (3) the alumni or youth, who were under instruction. The dress of the monks consisted of a white tunica or undergarment, over which they wore a camilla, consisting of a body and hood made of wool, and of the natural colour of the material. When working or travelling their feet were shod with sandals; they took a solemn monastic vow on bended knees in the oratorium, were tonsured from ear to ear--the fore part of the head being made bare, and the hair allowed to grow only on the back part of the head. The church of Iona was monastic, and in it we find neither a territorial episcopacy nor a presbyterian parity. The bishops were under the monastic rule, and were, in respect of jurisdiction, subject to the abbot, even though a presbyter, as the head of the monastery; the privilege of the episcopate was not interfered with.[192] The monastery was described as a "gloriosum caenobium."