In 1764, on December 12th, the oratorio "Judith" was repeated, and a new opera with Arne's music, "The Guardian Outwitted," was produced at Covent Garden Theatre. The libretto was also the work of Arne. The music of this opera has disappeared, probably in the fire which consumed the theatre in 1808. His "Arcadian Nuptials"--a Masque introduced into "Perseus and Andromeda"--was also played, with Mr. Beard and Miss Hallam in the principal parts. In 1765, on the 30th of October, Mr. William Mawhood, an intimate friend of Arne's, proposed him as a member of the Madrigal Society, founded in 1741, a worthy assembly of musicians and amateurs who met regularly to practise the best examples of old English and Italian madrigals. The books of the Society, which still exist, show that Arne paid six shillings and sixpence subscription, and that his son, Michael, was elected a member shortly after. In this year Arne composed an Italian opera, "Olimpiade," to a libretto by Metastasio, with a special part for the male soprano Manzuoli. This was performed at the King's Theatre, in the Haymarket, twice only; we may therefore conclude it was not a success. Arne composed a considerable amount of music for male voices, unaccompanied, chiefly Glees and Catches. He obtained three prizes for pieces he sent in competition to the Noblemen and Gentlemen's Catch Club (founded in 1761). His Glee, "Come, shepherds, we'll follow the hearse," was for many years sung after the announcement of the death of a member. The proceedings of the Society were frequently of a highly convivial nature, and it is to be feared that Arne found them greatly to his liking; in one instance he outraged good taste and becoming reverence by composing a burlesque on a most solemn religious rite, to the words "Poculum elevatum." He deserves credit for his endeavours to popularise vocal concerted music in the theatre and at garden entertainments; he took care not to present his musical programmes without due rehearsal. A letter of his, without date, probably written about 1766, is evidence of this. "Dr. Arne's compliments to W. Smith desiring him not to fail meeting the other gentlemen concern'd in the new Catches and Glees, at the Dr.'s house, on Thursday evening next, exactly at 7; having reason to hope for some continuance of them; if perform'd with a requisite spirit and humour; besides another material employment for him on the Anvil. (Jan. y^{e} 2d.) West Street, near Litchfield street, Soho. Pray don't forget to bring the part." It may be necessary to explain that the Mr. W. Smith to whom the above reminder was sent was not only a singer, but also the engraver of many of Arne's publications, and therefore familiar with the use of the anvil; evidently the composer had music waiting publication.