expressions as Cicero uses of his army in Cilicia, ‘exercitum lustravi’ (_Att._ v. 20. 2). Even the fleets were subjected to the same process: and in Livy xxix. 27 we have a prayer addressed by Scipio to the deities of the sea before sailing for Africa, which may remind us of those used during the lustration of the people at Iguvium. Further, at this same time, in spring, before the season of arms, all the appurtenances of the army were ‘purified’--the horses, the arms, and the trumpets. So at least we may gather from the fact that there was a festival in the oldest religious calendar at the end of February called Equirria, and another of the same name on March 14 following; though the real meaning of the word was lost in later times, this explanation is strongly suggested by the dates, and also by the place, i. e. the Campus Martius. (If this was flooded it took place on the Caelian hill.) The details of the festival, which must have included horse racing, are unfortunately lost. The Equirria of March 14 seems to correspond to a curious rite, of which the date is October 15, i.e. after the season of arms; on that day there was a two-horse chariot-race in the Campus Martius, and the near horse of the winning chariot was sacrificed to Mars, with peculiar ritual following the slaughter. It is tempting to refer this rite to a lustratio of the horses after their return from a campaign: but here again the details of a true lustratio are not forthcoming. It may have originally been, as Wissowa suggests, a cathartic rite purifying the army from the taint of bloodshed (cf. _G. B._ i. 332 foll.); the blood of the sacrificed horse was allowed to drip upon the sacred hearth of the Regia, and it is probable that it was used in the making of certain sacred cakes (_mola salsa_) of great cathartic value. But it is remarkable that this rite was not included in the festivals of the ancient calendar: we know of it only from other sources. I am inclined to hazard a guess that it belonged to a type of ceremony which the earliest pontifical legislators were unwilling to recognize; their efforts, as it seems to me, must have been directed to make the worship of the people as pure and orderly as possible.[126]