St. David was, as we have already seen, one of the great founders of the monastic church; and Kentigern had not been long with him when he applied to the king for land to build a monastery, where he might unite together a people acceptable to God and devoted to good works; and the king, whom Jocelyn calls Cathwallain, allowed him to choose his own place. Kentigern, ‘with a great crowd of his disciples along with him, went round the land and walked throughout it exploring the situations of the localities, the quality of the air, the richness of the soil, the sufficiency of the meadows, pastures and woods, and the other things that look to the convenience of a monastery to be erected;’ and is finally conducted by a white boar ‘to the bank of a river called Elgu, from which to this day, as it is said, the town takes its name.’ Here he commenced to construct his monastery; ‘some cleared and levelled the situation, others began to lay the foundation of the ground thus levelled; some cutting down trees, others carrying them and others fitting them together, commenced, as the father had measured and marked out for them to build a church and its offices of polished wood, after the fashion of the Britons, seeing that they could not yet build of stone, nor were so wont to do.’[366] Here we are treading on somewhat firmer ground. The monastery described is that of Llanelwy, afterwards called St. Asaph’s. It is in the vale of Clwyd, at the junction of the river Elwy with the Clwyd, a name possibly given to it by Kentigern from some fancied resemblance to the river and valley in the north where he had his original seat; and the Red Book of St. Asaph’s records several grants made to Kentigern by Maelgwyn Gwyned, the king of North Wales at this time.[367]