One important result of this practice was that the voices and abilities of the principal singers had to be considered in order that the arias might be effective. The singers were thus enabled to make such great personal impressions upon the public that they soon became the reigning power in opera, and actually made laws for the composers. This was the period of the famous male soprano singers Farinelli, Cafarelli, Senesino, Gizziello, and others, whose marvellous singing was due to long processes of training, and who were the adored and inexorable monarchs of the musical world. The state of Italian opera in the time of Handel (1685-1759) is more easily described than imagined. I have already told how the famous composer of "The Messiah" began his career as an opera composer. He wrote some forty operas, all of which have now only an historical interest. Arias and duets from them are frequently heard in concert, and are excellent examples of the manner in which composers treated text in those days. To two lines of text one frequently finds half a dozen pages of music, the words apparently being employed simply to give the singer syllables to pronounce. It must be said for Handel that he was too great a composer to turn out mere rubbish. While he displayed remarkable dexterity in writing passages of pure vocal exhibition work for the singers, he contrived to put a considerable quantity of very good music into his operas. Nevertheless he was under the control of the singer and the formulæ of the time. The laws of Italian opera in that day prescribed six persons--three men and three women--as the proper number of singers. The men were always sopranos or tenors. The use of the baritone voice was quite unknown; sometimes a bass part was written for one of the men, but as there are only a few fine bass parts in any of the old operas, and no records of the fame of any great basses except Boschi, we must conclude that only the male soprano and tenor had any wide vogue. In Handel's "Teseo" there was neither bass nor tenor; all the parts were sopranos and contraltos. Of course there were male characters, so it is easy to conceive how far away from anything like dramatic truth the whole thing must have been. The common use of the baritone voice, the voice of the average man, did not begin till the latter part of the last century. The French composers, who, as we shall see, clung more faithfully to dramatic fidelity than the Italians, were the first to use it extensively. Gluck made frequent use of it, but it remained for Mozart to discover the full scope of its usefulness.