Percy John (Delf) Smith (1882-1948) was a British etcher, letterer, calligrapher and designer of monuments.  Some of his stonework included the inscription of war graves and tombstones.  He was a member of London’s Guild of Memorial Craftsmen.

Resources Cited:
Papers of Ellen Marion Delf Smith at Queen Mary, University of London
http://www.aim25.ac.uk/cgi-bin/vcdf/detail?coll_id=3025&inst_id=39

Edited: https://aim25.com/cgi-bin/vcdf/detail?coll_id=3025&inst_id=39

Percy John Smith papers at the National Art Library of Britain
http://ipac.nal.vam.ac.uk/ipac20/ipac.jsp?session=13V5H987440M9.1173549&profile=nal&uri=full=1100001@!388348@!5&ri=3&aspect=basic_search&menu=search&source=193.62.210.16@!nal&ipp=20&staffonly=&term=Smith%2C+Percy+John+Delf%2C+1882-1948&index=&uindex=&aspect=basic_search&menu=search&ri=3

Edited: https://discovery.nationalarchives.gov.uk/details/c/F49854