Source: Photo submission of headstone by The London Robinsons at the 18th Battalion Facebook Group.
Family Search: Private Herbert Barnes was born on 18 March 1878, in Witney, Oxfordshire, England, United Kingdom. He had at least 1 son with Martha Leigh. He immigrated to Canada in 1913. He registered for military service in 1915. In 1915, at the age of 37, his occupation is listed as butcher. He died on 2 January 1949, in London, Ontario, Canada, at the age of 70, and was buried in Mount Pleasant Cemetery, West McGillivray, North Middlesex, Middlesex, Ontario, Canada.
The man enlisted in the 70th Battalion CEF in London, Ontario on October 12, 1914. He was married to Mrs. Martha Barnes, residing at 603 Oxford Street, London, Ontario. He was a butcher by trade.
He served with the Battalion after a short assignment to the 39th Battalion. Coming to the 18th in October 1916, he fought a Vimy. A stint of illness had him leave for medical care, returning in the latter part of 1917 to serve with the Battalion until it returned to Canada in May 1919. He was released on the last day of its formal existence in London.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 