But the chief title of the period we are considering, to the indulgence of posterity, lies in its missionary labours. The stream of missionaries which had at first flowed from Palestine and Italy began to flow from the West. The Irish monasteries furnished the earliest, and probably the most numerous, labourers in the field. A great portion of the north of England was converted by the Irish monks of Lindisfarne. The fame of St. Columbanus in Gaul, in Germany, and in Italy, for a time even balanced that of St. Benedict himself, and the school which he founded at Luxeuil became the great seminary for mediæval missionaries, while the monastery he planted at Bobbio continued to the present century. The Irish missionary, St. Gall, gave his name to a portion of Switzerland he had converted, and a crowd of other Irish missionaries penetrated to the remotest forests of Germany. The movement which began with St. Columba in the middle of the sixth century, was communicated to England and Gaul about a century later. Early in the eighth century it found a great leader in the Anglo-Saxon St. Boniface, who spread Christianity far and wide through Germany, and at once excited and disciplined an ardent enthusiasm, which appears to have attracted all that was morally best in the Church. During about three centuries, and while Europe had sunk into the most extreme moral, intellectual, and political degradation, a constant stream of missionaries poured forth from the monasteries, who spread the knowledge of the Cross and the seeds of a future civilisation through every land, from Lombardy to Sweden.(516) On the whole, however, it would be difficult to exaggerate the superstition and the vice of the period between the dissolution of the Empire and the reign of Charlemagne. But in the midst of the chaos the elements of a new society may be detected, and we may already observe in embryo the movement which ultimately issued in the crusades, the feudal system, and chivalry. It is exclusively with the moral aspect of this movement that the present work is concerned, and I shall endeavour, in the remainder of this chapter, to describe and explain its incipient stages. It consisted of two parts—a fusion of Christianity with the military spirit, and an increasing reverence for secular rank.