Melizophilus provincialis, Meyer, British Birds, folio Ed., vol. i, pl. 67 (coloured figure of adult male and egg) [1835-43]; Macgillivray, British Birds, vol. ii, pp. 383-387 (woodcut), 1839; Hewitson, British Oology, 1st Ed., vol. ii, 1 p., pl. 147 (egg), 1838; id., Eggs of British Birds, 2nd Ed., vol. i, pp. 105-106, pl. 29 (egg), 1846; id., id., 3rd Ed., vol. i, pp. 143-145, pl. 37 (eggs), 1854; Gould, Birds of Great Britain, vol. ii, 2 pp., pl. 59 (coloured figures of adults), 1862; Lilford, Coloured Figures, vol. iii, p. 48, pl. 24 (coloured figures of adults), 1887.
Melizophilus undatus, Yarrell, British Birds, 4th Ed., edited by Newton, vol. i, pp. 398-405 (2 woodcuts of bird and nest), 1873; Dresser, Birds of Europe, vol. ii, pp. 441-446, pl. 69 (coloured figures of adult and young), 1875.
Sylvia undata, Seebohm, British Birds, vol. i, pp. 414-417, pl. 10, fig. 7 (egg), 1883.
Sylvia provincialis, Booth, Rough Notes, vol. ii, pp. 67-68, 1885.
Sylvia undata, Saunders, Manual of British Birds, 2nd Ed., pp. 55-56 (woodcut), 1897.
Adult Male in Spring.—The upper parts are dark chocolate brown but rather more slate colour on the crown. The wing-coverts are the same colour as the back, the flight-feathers dark brown, the innermost secondaries rather broadly edged with rusty brown, and the remainder narrowly edged with the same colour. The bastard wing is slate colour with narrow whitish edges to the feathers and the axillaries are whitish. The tail is slate colour, each feather being edged with brownish grey becoming lighter towards the tip, and the outer web of the outermost tail-feather is whitish towards the tip. The shafts are dark slate. The space in front of the eye
