▁out ▁he ▁won ▁scholar ships ▁which ▁enabled ▁him ▁to ▁study ▁mathematics ▁at ▁St ▁John ' s ▁College , ▁Cambridge ▁from ▁October ▁ 1 9 4 1 ▁until ▁November ▁ 1 9 4 3 , ▁when ▁he ▁was ▁sent ▁for ▁war ▁service ▁to ▁the ▁Ministry ▁of ▁Supp ly ' s ▁department ▁of ▁Statist ical ▁Method ▁and ▁Qu ality ▁Control ▁in ▁London . ▁▁ ▁This ▁work ▁did ▁not ▁satisfy ▁him , ▁so ▁he ▁en rolled ▁at ▁B irk beck ▁College , ▁London ▁where ▁he ▁joined ▁the ▁week ly ▁sem inar ▁of ▁Professor ▁Paul ▁D ien es ▁which ▁was ▁then ▁a ▁focus ▁for ▁mathematical ▁activity ▁in ▁London . ▁Hen stock ▁wanted ▁to ▁study ▁diver gent ▁series ▁but ▁D ien es ▁pre va iled ▁upon ▁him ▁to ▁get ▁involved ▁in ▁the ▁theory ▁of ▁integration , ▁thereby ▁setting ▁him ▁on ▁course ▁for ▁his ▁life ' s ▁work . ▁ ▁A ▁devoted ▁Method ist , ▁the ▁last ing ▁impression ▁he ▁made ▁was ▁one ▁of ▁gentle ▁sin cer ity ▁and ▁ami ability . ▁Hen stock ▁married ▁Mar jor ie ▁J ard ine ▁in ▁ 1 9 4 9 . ▁Their ▁son ▁John ▁was ▁born ▁ 1 0 ▁July ▁ 1 9 5 2 . ▁Ralph ▁Hen stock ▁died ▁on ▁ 1 7 ▁January ▁ 2 0 0 7 ▁after ▁a ▁short ▁ill ness . ▁ ▁Work ▁He ▁was ▁awarded ▁the ▁Cambridge ▁B . A . ▁in ▁ 1 9 4 4 ▁and ▁began ▁research ▁for ▁the ▁Ph D ▁in ▁B irk beck ▁College , ▁London , ▁under ▁the ▁super vision