Correct!
Harry Wales and Lawrence Gillies served in the 13th Company of Engineers and the Gillies family were stonemasons so on return from the war, the two set up business together, Returned Soldiers’ Monumental Masons.
As well as the West Guildford War Memorial, Wales and Gillies were responsible for war memorials in Bayswater (1922) , Mt Lawley (1924) and Claremont (1922). Harry Wales died in 1954 in Western Australia and it is believed that Lawrence Gillies died in 1961 in New South Wales.