ethereal countertenor voice that is Oberon, the male lead, who throughout is accompanied by a characteristic texture of harp and celeste, in the same way that Puck's appearance is heralded by the combination of trumpet and snare-drum. The opera opens with a chorus, "Over hill, over dale" from Tytania's attendant fairies, played by boy sopranos. Other highlights include Oberon's florid – the exotic celeste is especially notable – aria,"I know a bank" (inspired by Purcell's "Sweeter than roses", which Britten had previously arranged for Pears to sing), Tytania's equally florid "Come now, a roundel", the chorus's energetic "You spotted snakes", the hilarious comedy of Pyramus and Thisbe, and the final trio for Oberon, Tytania and the chorus. The introduction of a chorus of boy-fairies means that the opera becomes greatly concerned with the theme of purity. It is these juvenile fairies who eventually quell the libidinous activities of the quartet of lovers, as they sing a beautiful melody on the three "motto chords" (also on the four "magic" chords) of the second act: "Jack shall have Jill/Naught shall go ill/The man shall have his mare again/And all shall be well." Sung by boys, it could be considered that this goes beyond irony, and represents an idealised vision of a paradise of innocence and purity that Britten seems to have been captivated by throughout his life. Britten also pays attention to the play's central motif: the madness of love. Curiously he took the one relationship in the play that is grotesque (that of Tytania and Bottom) and placed it in the centre of his opera (in the middle of act 2). Women in Britten operas tend to run to extremes, being either predators or vulnerable prey, but Tytania is an amalgam; she dominates Bottom, but is herself completely dominated by Oberon and Puck, the couple that are usually considered to really hold power in The Dream. Their cruel pranks eventually quell her coloratura, which until she is freed from the power of the love-juice is fiendishly difficult to sing. Britten also parodied operatic convention in less obvious ways than Pyramus and Thisbe. Like many other operas, A Midsummer Night's Dream opens with a chorus, but it is a chorus of unbroken boys' voices, singing in unison. After this comes the entrance of the prima donna and the male lead, who is as far away as possible from Wagner's heldentenors, and as