It was just three years after the deacon-abbot of Monte Casino had passed to his reward, that the young Irish deacon began his monastery. To erect monastic buildings in those days was a work of very little labor. A wooden church, destined in the course of time to give place to a more durable edifice--the seat of a bishopric--was first erected. Then the cells of the monks were put up. They were of circular form and of the simplest construction. A stout post was firmly planted in what was to be the centre, and a number of slighter poles were then placed at equal distances round it. The interstices--space however having been left for a door--were filled up with willow or hazel saplings in the form of basketwork. From the outer poles rafters sprang to the centre-posts, and across them were laid rows of laths over which a fibry web of sod was thrown, and the whole thatched with straw or rushes. The inside of the wall was lined with moss--the outside plastered with soft clay. A rough wooden bed--and in the case of Columba himself and many of his monks--a stone pillow, a polaire or leathern satchel for holding books, a writing-desk and seat, formed the furniture of this rude cell, which was the ordinary dwelling of monk and student during the golden age of the Irish Church. Only a few weeks elapsed from the time that the first tree was felled till the new community, or rather order, took up their abode in it, and the swelling strain of their vespers was borne down the Lough by the rippling breeze and echoed by the religious, whose convents, presided over by SS. Frigidian and Cardens sentinelled the mouth of the Lough at Moville and Coleraine. The habit of these monks--similar to that of Iona and Lindisfarne, consisted of "[2]the cowl--of coarse texture, made of wool, retaining its natural color and the tunic, or under habit, which was also white. If the weather was particularly severe an amphibalus, or double mantle, was permitted. When engaged at work on the farm the brethern wore sandals which were not used within the monastery." Though their time was mainly devoted to prayer, meditation and the various other religious exercises, yet their rule made them apply every spare moment to copying and illuminating MSS. or some other kind of manual or intellectual labor, according as their strength and talents permitted. By this, people were attracted to the spot. Houses sprang up in the neighborhood of the monastery, that continually increasing in number, at length grew into a city, just as from a similar monastic germ have sprung nearly all the great German cities.