Emery Walker was a process engraver and typographical expert. At the time of the 1881 census he was living with his Irish wife, Mary Grace Walker at 3 Hammersmith Terrace. He is mentioned in JW's correspondence in the late 1880s.
He worked with William Morris at the Kelmscott Press. In 1900 he founded the Doves Press with T. J. Cobden-Sanderson; he left the press in 1905. Subsequently he worked with Harry Graf Kessler on the type for the Cranach Press.
UK census 1881 at http://www.familysearch.org (accessed 2004.6); Harrop, Dorothy A., Sir Emery Walker, London, 1986; Obituary, (privately printed), 1933 (in British Library).