The druids are represented as carrying wands of yew, but there is nothing in Irish literature, so far as I am aware of, about their connection with the oak, from the Greek for which, _δρῦς_,[16] they are popularly supposed to derive their name. They used to be consulted as soothsayers upon the probable success of expeditions, as by Cormac mac Art, when he was thinking about extorting a double tribute from Munster,[17] and by Dáthi, the last pagan king of Ireland, when setting out upon his expedition abroad; they took auguries by birds, they could cause magic showers and fires, they observed stars and clouds, they told lucky days,[18] they had ordeals of their own,[19] but, above all, they appear to have been tutors or teachers. Another druidic practice which is mentioned in Cormac's Glossary is more fully treated of by Keating, in his account of the great pagan convention at Uisneach, a hill in Meath, "where the men of Ireland were wont to exchange their goods and their wares and other jewels." This convention was held in the month of May, "And at it they were wont to make a sacrifice to the arch-god, whom they adored, whose name was Bél. It was likewise their usage to light two fires to Bél in every district in Ireland at this season, and to drive a pair of each herd of cattle that the district contained between these two fires, as a preservative, to guard them against all the diseases of that year. It is from that fire thus made that the day on which the noble feast of the apostles Peter and James is held has been called Bealtaine [in Scotch Beltane], _i.e._, Bél's fire." Cormac, however, says nothing about a god named Bél--who, indeed, is only once mentioned elsewhere, so far as I know[20]--but explains the name as if it were Bil-tene, "goodly fire," from the fires which the druids made on that day through which to drive the cattle.[21] Post-Christian accounts of the druids as a whole, and or individual druids differ widely. The notes on St. Patrick, in the Book of Armagh, present them in the worst possible light as wicked wizards and augurs and people of incantations,[22] and the Latin lives of the Saints nearly always call them "magi." Yet they are admitted to have been able to prophecy. King Laoghaire's [Leary's] druids prophesied to him three years before the arrival of Patrick that "adze-heads would come over a furious sea," "Their mantles hole-headed, Their staves crook-headed, Their tables in the east of their houses."[23]