The king was exorcised, and the exorcists of the kingdom were called upon to put stringent questions to the devils they cast out.
They speak of the ordination of bishops (the so-called Clementine Liturgy is that which is directed to be used at the consecration of a bishop, cc. 5-15), of presbyters, deacons, deaconesses, subdeacons and lectors, and then pass on to confessors, virgins, widows and exorcists; after which follows a series of canons on various subjects, and liturgical formulae.
This, so far as its potestates ordinis are concerned, is divided into seven orders: the three " major orders " of bishops and priests, deacons, and subdeacons (bishops and priests forming two degrees of the ordo sacerdotium), and the four " minor orders " of acolytes, exorcists, readers, and door-keepers.
Tertullian, while speaking of readers and exorcists, says nothing about acolytes; neither does St Augustine.
He pours scorn upon the exorcists - who were clearly in league with the demons themselves - and upon the excesses of the itinerant and undisciplined "prophets" who roam through cities and camps and commit to everlasting fire cities and lands and their inhabitants.