_Air II_: "Brisk Tom and Jolly Kate" is Air IX of Lacy Ryan's _The Cobler's Opera_ (London 1729), which has tunes by Leveridge, Purcell, and others. The lyrics in Ryan's piece allude to Bridewell: "Pray; Sir, did I not give to you a Passage free/When Hemp did threaten," (pp. 14-15). _Air III_: "Maggy Lawther" is a tune used by Theophilus Cibber (Air IX) in _Patie and Peggy ... A Scotch Ballad Opera_ (London 1730), p. 10. _Air IV_: "Oh! what Pleasures will abound" is Air VII of Henry Fielding's _The Lottery_ (London 1732). Johann Pepusch composed the music for this air in collaboration with Lewis Theobald for the pantomime opera _Perseus and Andromeda_ (1730). Fielding's name for the tune was "In Perseus and Andromeda." _Air V_: "Lads a Dunce." The music is preserved in British Library Add. MS. 29371, fol. 30a, no. 45, and printed in Fielding's _The Grub-Street Opera_ as Air II (ed. Edgar V. Roberts, Lincoln: University of Nebraska Press, 1968), p. 92. Its composer is not known. _Air VI_: "Maidens fresh as a Rose" appears as Air VI in Ebenezer Forrest's ballad opera _Momus turn'd fabulist; or, Vulcan's Wedding_, a work translated from the French of Fuzelier and Le Grand (London 1729), p. 12. It also could be the song in D'Urfey's _Wit and Mirth: or, Pills to Purge Melancholy_ (1719), with a slightly different title, "Maiden fresh as a Rose," though the syllabic pattern does not seem to match: "Young buxome and full of jollity,/Take no Spouse among Beaux," (I, p. 57). THE RAKE'S PROGRESS _Airs I-III_ are not traceable ("From Virue's sluggish Rules be free," "Mary's Dream" and "Alteration"). _Air IV_: "Duett" to the tune "An Old Woman Cloathed in Gray" is the familiar first tune of John Gay's _The Beggar's Opera_, ed. Edgar V. Roberts (Lincoln: University of Nebraska Press, 1969), pp. 94-95. _Air V_: Van Butchel's song ("See Martin dus his goods display") is not in the songbooks. Prof. Roberts suggests the lyrics could fit the music of "Lillibullero," sometimes used for songs in dialect. Henry Purcell wrote or arranged this Irish burden which was used in 12 ballad operas, including Fielding's _Don Quixote in England_ (1733). Simpson (p. 454) gives one example in dialect: "By Creist my dear Morish vat makes de sho'shad" (ca. 1689). _Air VI_: "Shelah O'Sudds" (to the tune "The Siege of Troy") is not traceable. _Air VII_: "Medley. Tune, 'Petition Poor Vulcan'" is from Charles Dibdin's burletta _Poor Vulcan!_ (London 1778) which begins: "The humble prayer and petition/Of Vulcan, who his sad condition" (I, 1, p. 7). _Air VIII_: "Tune. Hunting Chorus, 'Poor Vulcan'" is the "Chorus and Air" from Dibdin's _Poor Vulcan!_ It begins: "Blacksmith: 'Strike, strike, ton, ton ton, ron'/Huntsman: 'Sound, Sound, tan, ran, ran, tan'" (I, ii, p. 10).