Benezit notices a Frederick Bromley as a London engraver, who exhibited from 1856-1860 at the RA and SS. Graves may be listing a later artist. F Bromley exhibited at the Walker Art Gallery in Liverpool in 1885 from an address in Penzance.
RA and SS 1856-1860
Graves British Artists 1880-1940
Hardie (2009) Artists in Newlyn and West Cornwall
Johnson & Greutzner (1975) Dictionary of British Artists