Looking at messages on Rootschat - in Robert Garnet VAREY's death notice in Austrlia 1855 - it states he was from Monmouth. Perhaps if you could put this 'notice' on this forum - this may be useful. Also the fact Robert appears to have a middle family name.

There is a John VARNEY buried at Lydney -26 July 1850 age 75 at Newent - and looking at my Glos. CD's there are various possible spellings of the surname, i.e VARNAY/VARNEY etc.