Despite all of my study of gun engraving, I can't answer your question. 19th century British engravers were not considered any more noteworthy than any other gun craftsman and never signed their work. In some cases a known engraver's work can be identified by their scrollwork but most 19th century engravers worked in anonymity.

C. Roger Bleile
Author of American Engravers-The 21st Century
FEGA Historian
www.engravingglossary.com