Your William was the son of Laurence Edward Carson and Adelaide Dobell, birth registered in Richmond 1890, #26854. His is not listed on the Victorian death index, unless he died after 1985. William enlisted in the in the Australian Army for WW2 and served 5 months. He listed his locality as Bendigo and NOK as Adelaide Aumont.
CARSON WILLIAM PERCIVAL : Service Number - V82570 : Date of birth - 05 Jul 1890 : Place of birth - RICHMOND VIC : Place of enlistment - BENDIGO VIC : Next of Kin - AUMONT ADELAIDEhttp://naa12.naa.gov.au/SearchNRetrieve/Interface/DetailsRep...
Hope this helps,