▁by ▁Ron ald ▁in ▁ 2 0 0 6 . ▁ ▁Les lie ▁M ▁Per rott ▁Junior ▁( 1 9 2 6 – 2 0 0 1 ) ▁ ▁After ▁gradu ating ▁in ▁ 1 9 5 1 , ▁Les lie ▁J nr , ▁known ▁simply ▁as ▁Les ▁Per rott , ▁set ▁about ▁expand ing ▁the ▁office ▁to ▁take ▁part ▁in ▁the ▁post war ▁bo om . ▁With ▁the ▁ret irement ▁of ▁his ▁father ▁in ▁ 1 9 6 6 , ▁he ▁became ▁lead ▁architect ▁of ▁the ▁firm , ▁along ▁with ▁Ron ▁Lyon , ▁and ▁was ▁generally ▁responsible ▁for ▁getting ▁in ▁the ▁work ▁rather ▁than ▁design ing . ▁ ▁Brian ▁George ▁Math ies on ▁ ▁In ▁ 1 9 6 7 ▁Brian ▁Math ies on ▁won ▁an ▁RA IA ▁Silver ▁Medal ▁for ▁his ▁Th esis ▁on ▁High ▁D ens ity ▁H ous ing . ▁He ▁was ▁the ▁lead ▁designer ▁for ▁the ▁M MB W ▁project , ▁and ▁was ▁the ▁last ▁remaining ▁partner ▁when ▁the ▁firm ▁w ound ▁up ▁c 2 0 1 5 . ▁ ▁David ▁Sim pson ▁( 1 9 2 9 - ▁) ▁ ▁After ▁gradu ation ▁in ▁ 1 9 5 5 ▁and ▁working ▁for ▁a ▁few ▁years ▁in ▁the ▁UK ▁and ▁Canada , ▁David ▁Sim pson ▁joined ▁the ▁firm ▁in ▁the ▁early ▁ 1 9 6 0 s , ▁and ▁was ▁soon ▁given ▁the ▁responsibility ▁for ▁the ▁Prin ces ▁Gate ▁project . ▁Later ▁he ▁did ▁the ▁concept ▁designs ▁for ▁Museum ▁Station ▁( now ▁Melbourne ▁Central ), ▁and ▁left ▁when