The early Christians readily adapted some of the best heathen customs to their own requirements, and thus we soon find them making a perambulation round their fields, accompanied by their bishops and clergy. They repeated litanies, and implored God to avert plague and pestilence, and to enable them in due season to reap the fruits of the earth. "The Litanies or Rogations then used gave the name of Rogation Week to this time. They occur as early as the 550th year of the Christian era, when they were first observed by Mamertius, Bishop of Vienna, on account of the frequent earthquakes that happened, and the incursions of wild beasts, which laid in ruins and depopulated the city."[17] Some idea of the importance which eventually came to be attached to this Rogation time, may be gathered from an old sermon, still extant, in which the preacher, after animadverting upon a growing misuse of the festival by certain people, tells them that for this cause "it is merveyle God destroye us not in one daye,"--and then proceeds as follows:--"In these Rogation Days, it is to be asked of God, and prayed for, that God of his goodness wyll defende and save the corne in the felde, and that he wyll vouchsave to pourge the ayer. For this cause be certaine Gospels red in the wide felde amonges the corne and grasse, that by the vertue and operation of God's word, the power of the wicked spirites, which kepe in the air and infecte the same (whence come pestilences and the other kyndes of diseases and syknesses) may be layde downe, and the aier made pure and cleane, to th' intent the corne may remaine unharmed, and not infected of the sayd hurteful spirites, but serve us for our use and bodely sustenaunce." In order that we may now get a better idea of what these processions were like, we cannot do better than turn to Shaw's _History of Staffordshire_.[18] We there learn that "Among the local customs which have prevailed (at Wolverhampton), may be noticed that which was popularly called 'Processioning.' Many of the older inhabitants can well remember when the sacrist, resident prebendaries, and members of the choir, assembled at Morning Prayers on Monday and Tuesday in Rogation Week, with the charity children, bearing long poles clothed with all kinds of flowers then in season, and which were afterwards carried through the streets of the town with much solemnity, the clergy, singing men and boys, dressed in their sacred vestments, closing the procession, and chanting in a grave and appropriate melody, the Canticle, Benedicite Omnia Opera, etc.... It was discontinued about 1765."