found: Parkyn, G. Elvis Costello, c1984:t.p. (Elvis Costello)
found: His Spike, c1989:t.p. (Elvis Costello) p. 6 (words and music by D.P.A. MacManus)
found: Encyc. of rock, 1988(Costello, Elvis; b. Declan MacManus; in London, 25 Aug. 1954)
found: Wikipedia WWW site, Dec. 9, 2005(under Elvis Costello: Declan Patrick Aloysius MacManus, better known by his stage name, Elvis Costello; b. Aug. 25, 1954, London; popular British musician, singer, and songwriter of Irish ancestry)
found: Wikipedia WWW site, Feb. 3, 2011(under Elvis Costello: Costello adopted the alias Napoleon Dynamite; the pseudonym had previously been used in 1982, when the B-side single "Imperial Bedroom" was credited to Napoleon Dynamite & The Royal Guard; was later appropriated by the 2004 film Napoleon Dynamite)
found: Wikipedia, November 4, 2014(Elvis Costello; under the pseudonym The Imposter, Costello released Pills and soap, an attack on the changes in British society brought on by Thatcherism; released to coincide with the run-up to the 1983 UK general election) - http://en.wikipedia.org/wiki/Elvis_Costello