▁the ▁walls ▁diff ers ▁from ▁the ▁later ▁sections ▁of ▁the ▁house ▁being ▁built ▁of ▁sand stock ▁brick ▁( made ▁by ▁conv ict s ▁from ▁local ▁cl ay ) ▁rather ▁than ▁from ▁random ▁rub ble . ▁ ▁The ▁farm ▁out build ings ▁are ▁understood ▁to ▁have ▁included ▁a ▁det ached ▁kitchen ▁and ▁store , ▁st ables , ▁coach ▁house , ▁sla ugh ter ▁house , ▁stock ▁yards ▁and ▁conv ict ▁h uts . ▁Many ▁of ▁the ▁earliest ▁out ▁buildings ▁are ▁thought ▁to ▁have ▁been ▁located ▁west ▁of ▁the ▁house ▁as ▁the ▁house ▁was ▁originally ▁orient ed ▁towards ▁the ▁east ▁looking ▁out ▁to ▁the ▁George ' s ▁River . ▁Early ▁transport ▁to ▁the ▁B unker ' s ▁Farm ▁was ▁by ▁the ▁George ' s ▁River ▁until ▁the ▁Great ▁South ▁Road ▁opened ▁in ▁ 1 8 1 4 . ▁It ▁would ▁appear ▁that ▁the ▁later ▁presentation ▁of ▁the ▁house ▁to ▁the ▁west ▁rel ates ▁to ▁the ▁new ▁transport ▁route ▁of ▁the ▁Great ▁South ▁Road . ▁ ▁Records ▁indicate ▁that ▁by ▁ 1 8 1 4 ▁E ber ▁B unker ▁( when ▁in ▁the ▁col ony ) ▁and ▁his ▁second ▁wife ▁and ▁two ▁of ▁his ▁children ▁were ▁living ▁at ▁Col ling wood . ▁Margaret ▁B unker ▁is ▁understood ▁to ▁have ▁run ▁the ▁farm ▁( B unker ' s ▁Farm ▁/ ▁Col ling wood ) ▁while ▁B unker ▁was ▁at ▁sea . ▁The ▁farm ▁supplied ▁fresh ▁meat ▁to ▁the ▁Government ▁St ores . ▁This ▁would ▁have ▁been ▁a ▁luc r ative ▁contract . ▁ ▁B unker ' s