Not sure exactly when Augusta Airways started doing it and I believe they took it over from PAGAS.
They did indeed take that run over from PAGAS and ran it for quite a few years under the Augusta Airlines name.
After they took over Lincoln Airlines in around '98 they renamed themselves Airlines of SA (the second incarnation of that name!) and continued with the mail run out of YPAG through to YBOU and return.
I wound up doing 36 runs as second Pilot in Chieftains on that service, in '03/04, and loved every minute of it!!
Hamish, Johnno, Troy, Daniel, Arpad, Anna et al; Those were the days!!
Anyone have any info re the Funeral?