This remarkable knowledge of Greek was evidently derived from an early and direct commerce with Gaul, where Greek had been spoken for four or five centuries, first alongside of Celtic, and in later times of Latin also.[7] The knowledge of Hebrew may have been derived from the Egyptian monks who passed over from Gaul into Ireland. Egypt and the East were more or less in close communication with Gaul in the fifth century, and the Irish Litany, ascribed to Angus the Culdee, commemorates seven Egyptian monks amongst many other Gauls, Germans, and Italians who resided in Ireland. The close and constant intercommunication between Greek-speaking Gaul and Ireland accounts for the planting and cultivation of the Greek language in the Irish schools, and once planted there it continued to flourish more or less for some centuries. There is ample evidence to prove the connection between Gaul and Ireland from the fifth to the ninth century. We find Gaulish merchants in the middle of Ireland at Clonmacnois, who had no doubt sailed up the Shannon in the way of commerce, selling wine to Ciaran in the sixth century. We find Columbanus, a little later on, inquiring at Nantes for a vessel engaged in the Irish trade--_quæ vexerat commercium cum Hibernia_. In Adamnan's Life of Columcille we find mention of Gaulish sailors arriving at Cantire. Adamnan's own treatise on Holy Places was written from the verbal account of a Gaul. In the Old Irish poem on the Fair of Carman in Wexford--a pagan institution which lived on in Christian times--we find mention of the "Great market of the foreign Greeks, Where gold and noble clothes were wont to be;"[8] the foreign Greeks being no doubt the Greek-speaking Gaulish merchants. Alcuin sends his gifts of money and oil and his letters direct from Charlemagne's court to his friends in Clonmacnois, probably by a vessel engaged in the direct Irish trade, for, as he himself tells us, the sea-route between England and France was then closed. If more proof of the close communication between Ireland and Gaul were wanted, the fact that Dagobert II., king of France in the seventh century, was educated at Slane,[9] in Ireland, and also that certain Merovingian and French coins have been found here, should be sufficient.