The Adjutant General, War Department response to the Georgia Pension Board was dated May 9, 1916. It appears Augustus died in 1916. I suspect that his widow filed for a widow's pension and referenced only his 1st Georgia Infantry attachment as this is the unit he appears to have identified among his local comrades and unaware of his Mississippi unit.

Died 1916
http://www.the-saleroom.com/en-gb/auction-catalogues/david-lay-f-r-i-c-s/catalogue-id-srdavid10021/lot-98a4806c-2dbd-4d6b-a238-a4440089fa06

See also: http://www.usgennet.org/usa/ga/county/fulton/bartowhistory/pg%20301-344red.pdf