Clifton, H. Polly Perkins of Pemberton Green, ca. 1865? t.p. (Harry Clifton)
Brown, J.D. British musical biography, 1897 (Clifton, Henry Robert, better known as Harry Clifton; b. 1831, Hoddesden, Hereford [sic]; d. July 15, 1872, Hammersmith, London; author, singer and composer of comic songs)
Kilgarriff, M. Sing us one of the old songs, 1998 (Clifton, Harry, 1832-72)
Baker, R.A. British music hall, 2005 p. 12 (Harry Clifton (Henry Robert Clifton); b. Hoddesdon, Hertfordshire, 1832; baptised May 20; d. July 15, 1872)