Walter Sickert : a life, 2005 p. 3 (Walter Richard Sickert; b. May 31, 1860, Munich ) p. 619 (d. Jan. 22, 1942, Bathampton) p. 551 (during 1925 he appeared in the press under a multiplicity of denominations: Walter Richard Sickert, W.R. Sickert, W. Richard Sickert and eventually Richard Sickert)
Grove art online, Oct. 25, 2013 (Sickert, Walter Richard; b. May 31, 1860, Munich; d. Jan. 22, 1942, Bathampton, Somerset; British painter, printmaker, teacher and writer)
Allgemeines Künstlerlexikon. Bio-bibliographischer Index A-Z, 2007-2009 (Sickert, Walter Richard (Sic; Sickert, Richard; Sickert, Walter); b. May 31, 1860, Munich; d. Jan 22, 1942, Bath or Bathampton (Bath); painter, etcher, illustrator, lithographer)