▁he ▁was ▁transferred ▁to ▁Northern ▁Rh odes ia ▁where ▁he ▁helped ▁to ▁conclude ▁the ▁Bar ots eland ▁Ag re ement ▁of ▁ 1 9 6 4 . ▁ ▁In ▁ 1 9 6 8 ▁Stewart ▁transferred ▁to ▁the ▁Diplom atic ▁Service ▁and ▁served ▁in ▁Barb ados ▁and ▁U g anda ▁before ▁being ▁appointed ▁Amb assador ▁to ▁the ▁Democratic ▁Republic ▁of ▁Vietnam ▁ 1 9 7 5 – 7 6 , ▁at ▁the ▁end ▁of ▁the ▁Vietnam ▁War ; ▁he ▁was ▁the ▁first ▁British ▁amb assador ▁to ▁Vietnam ▁to ▁be ▁based ▁in ▁H ano i ▁rather ▁than ▁Sa ig on . ▁He ▁was ▁head ▁of ▁the ▁Hong ▁Kong ▁department ▁at ▁the ▁Foreign ▁and ▁Commonwealth ▁Office ▁ 1 9 7 6 – 7 8 , ▁Amb assador ▁to ▁La os ▁ 1 9 7 8 – 8 0 , ▁Amb assador ▁to ▁Moz amb ique ▁ 1 9 8 0 – 8 4 , ▁and ▁High ▁Commission er ▁to ▁Sri ▁L anka ▁ 1 9 8 4 – 8 7 . ▁He ▁then ▁retired ▁from ▁the ▁Diplom atic ▁Service ▁and ▁was ▁chairman ▁of ▁the ▁Civil ▁Service ▁Selection ▁Board ▁ 1 9 8 7 – 9 4 . ▁ ▁Stewart ▁was ▁appointed ▁O BE ▁in ▁ 1 9 7 3 , ▁and ▁C M G ▁in ▁the ▁ 1 9 7 9 ▁New ▁Year ▁Hon ours . ▁ ▁References ▁S TE W ART , ▁John ▁Anthony ▁Bened ict , ▁Who ▁Was ▁Who , ▁A ▁& ▁C ▁Black , ▁ 1 9 2 0 – 2 0