g ard ▁Var èse . ▁He ▁actually ▁wrote ▁to ▁Var èse ▁to ▁ask ▁if ▁he ▁could ▁study ▁with ▁him ▁in ▁New ▁York ▁and ▁received ▁a ▁letter ▁of ▁ref us al , ▁not ▁very ▁long ▁before ▁Var èse ▁died ▁in ▁November ▁ 1 9 6 5 . ▁ ▁For ▁the ▁next ▁ 2 0 ▁years , ▁Jack ▁composed ▁somewhat ▁inter mitt ently , ▁but ▁his ▁works ▁included ▁" H olly ▁Bush ", ▁written ▁in ▁Poland ▁and ▁given ▁a ▁public ▁re he ars al ▁by ▁the ▁London ▁S inf on iet ta ▁under ▁Roger ▁Nor r ington ▁at ▁the ▁Queen ▁Elizabeth ▁Hall , ▁London ; ▁a ▁piano ▁con cer to ▁for ▁Roger ▁Wood ward , ▁which ▁was ▁never ▁performed ; ▁a ▁mon od ic ▁piece ▁for ▁any ▁instruments ▁or ▁voices , ▁" You ▁told ▁me ▁so ▁yourself ", ▁which ▁received ▁performances ▁by ▁different ▁solo ists ▁and ▁groups ▁both ▁in ▁England ▁and ▁abroad ; ▁and ▁" A ▁piece ▁for ▁learning " ▁– ▁a ▁" variable " ▁score ▁performed ▁under ▁Richard ▁Bern as ' s ▁direction ▁at ▁the ▁D art ington ▁Summer ▁School . ▁ ▁Jack ▁lect ured ▁at ▁the ▁Royal ▁College ▁of ▁Music ▁from ▁ 1 9 6 9 ▁to ▁ 1 9 7 7 , ▁then ▁he ▁joined ▁BBC ▁Radio ▁ 3 ▁as ▁a ▁script - writer ▁for ▁music ▁program mes . ▁He ▁left ▁the ▁BBC ▁in ▁ 1 9 9 3 ▁and ▁for ▁the ▁next ▁ten ▁years ▁was ▁active ▁as ▁a ▁fre el ance ▁music ▁critic ▁and ▁de vised ▁and ▁presented ▁several ▁radio ▁program