▁appointed ▁amb assador ▁to ▁Mexico ▁and ▁res umed ▁his ▁diplom atic ▁career . ▁He ▁subsequently ▁served ▁as ▁France ' s ▁amb assador ▁to ▁G amb ia ▁( 1 9 7 3 - 1 9 7 7 ), ▁Guinea - B iss au ▁( 1 9 7 5 - 1 9 7 7 ), ▁Sen eg al ▁( 1 9 7 5 - 1 9 7 7 ), ▁Canada ▁( 1 9 7 7 - 1 9 7 9 ), ▁Japan ▁( 1 9 7 9 - 1 9 8 2 ), ▁and ▁the ▁ ▁V at ican ▁( 1 9 8 3 - 1 9 8 5 ). ▁ ▁De ▁La ▁Che val erie ▁was ▁married ▁to ▁Marie - France ▁( née ▁His la ire ), ▁the ▁daughter ▁of ▁the ▁Belg ian ▁journalist ▁and ▁writer , ▁René ▁His la ire . ▁The ▁couple ▁had ▁seven ▁children . ▁X avier ▁de ▁La ▁Che val erie ▁died ▁on ▁ 2 1 ▁August ▁ 2 0 0 4 ▁in ▁Saint ▁Naz aire . ▁His ▁wife ▁pre - de ce ased ▁him ▁in ▁ 1 9 8 5 . ▁ ▁Notes ▁and ▁references ▁ ▁S ources ▁Andrew s , ▁William ▁( 1 9 8 2 ). ▁President ial ▁Government ▁in ▁Ga ull ist ▁France : ▁A ▁Study ▁of ▁Executive - Leg isl ative ▁Rel ations , ▁ 1 9 5 8 - 1 9 7 4 . ▁S UN Y ▁Press . ▁ ▁Ch iar ad ia , ▁É ric ▁( 2 0 1 1 ). ▁L