found: Wild life on a tidal water, 1890:p. [vii] ("The plates have been photo-etched by Messrs. A. Dawson and W.L. Colls")
found: PhotoSeed Web site, Sept. 26, 2011(Walter L. Colls, English copperplate engraver, amateur photographer and Linked Ring Brotherhood member; believed to have been the son of English fine art dealer Lebbeus Colls, 1818-1897; specialist in reproducing photographs by copperplate engraving, probably after joining Alfred Dawson's London firm the Typographic Etching Company) - http://photoseed.com/highlights/walter-colls/
found: Exhibitions of the Royal Photographic Society 1870-1915 Web site (De Montfort University), Sept. 26, 2011(Walter L. Colls, exhibited 1887, 1889, 1895, 1903; fellow of the RPS, 1895-1903; address: 6, Castlenau Gardens, Barnes, S.W.) - http://erps.dmu.ac.uk/exhibitor_details.php?year=1903&efn=Walter+L.+Colls
found: The Linked Ring, 1979:p. 149 (Walter L. Colls; had studio in Barnes, South London)
found: OCLC, Sept. 26, 2011(hdgs.: Colls, W. L.; Colls, Walter L.; Colls, Walter L., fl. 1894-1901; usage: W.L. Colls; Walter L. Colls)
notfound: ULAN;Allgemeines Künstlerlexikon