▁the ▁position ▁of ▁Director ▁of ▁the ▁British ▁Astronom ical ▁Association , ▁however ▁decl ined ▁due ▁to ▁his ▁plans ▁to ▁em igr ate ▁to ▁Australia ▁that ▁year . ▁ ▁After ▁arriv ing ▁in ▁Australia ▁ 1 2 ▁May ▁ 1 9 6 9 , ▁he ▁comm enced ▁at ▁the ▁Per th ▁Observ atory ▁as ▁an ▁Astronom er ▁Gra de ▁II ▁and ▁in ▁November ▁ 1 9 6 9 ▁took ▁over ▁the ▁running ▁of ▁the ▁Per th ▁Observ atory ▁Ast ro graph ic ▁teles cope ▁from ▁Dr ▁I ▁Nikol off . ▁ ▁His ▁numerical ▁pro w ess , ▁gained ▁during ▁his ▁time ▁at ▁H M ▁N aut ical ▁Al man ac ▁Office , ▁was ▁to ▁be ▁a ▁great ▁asset ▁in ▁the ▁ast rom et ric ▁programs ▁of ▁the ▁Per th ▁Observ atory , ▁as ▁was ▁his ▁interest ▁in ▁com ets . ▁ ▁It ▁took ▁little ▁time ▁for ▁C andy ▁to ▁position ▁the ▁Per th ▁Observ atory ▁at ▁the ▁fore front ▁of ▁southern ▁com et ary ▁ast rom etry . ▁By ▁ 1 9 7 2 , ▁the ▁Per th ▁Observ atory ▁was ▁ 9 th ▁in ▁the ▁world ▁in ▁producing ▁com et ary ▁positions . ▁Not ▁content ▁with ▁this , ▁C andy ▁introduced ▁new ▁phot ographic ▁glass ▁plate ▁processing ▁practices ▁to ▁increase ▁the ▁limit ing ▁magnitude ▁of ▁objects ▁achiev able ▁at ▁that ▁time ▁from ▁ 1 4 th ▁to ▁ 1 9 th . ▁The ▁new ▁processes ▁were ▁to ▁see ▁the ▁recovery ▁of ▁five ▁com ets ▁and ▁the ▁position ing ▁of ▁the ▁Observ atory ▁to