▁reference ▁from ▁Ex eter ▁and ▁then ▁spent ▁several ▁years ▁teaching ▁at ▁the ▁Tr inity ▁School ▁in ▁New ▁York ▁City . ▁In ▁ 1 9 8 4 , ▁the ▁teacher ▁moved ▁to ▁Dallas , ▁where ▁he ▁taught ▁at ▁St . ▁Mark ' s ▁until ▁his ▁ret irement ▁in ▁ 2 0 1 2 . ▁No ▁alleg ations ▁of ▁mis con duct ▁are ▁known ▁to ▁have ▁been ▁un cover ed ▁since ▁the ▁episodes ▁at ▁Ex eter ▁in ▁the ▁late ▁ 1 9 7 0 s , ▁and ▁it ▁appears ▁that ▁St . ▁Mark ' s ▁was ▁una ware ▁of ▁the ▁alleg ations ▁until ▁after ▁the ▁teacher ▁retired . ▁ ▁Notable ▁al umn i ▁▁ ▁Ros co e ▁De W itt , ▁ 1 9 1 0 ▁- ▁first ▁student ▁en rolled ▁at ▁Terr ill ; ▁architect ; ▁one ▁of ▁the ▁Mon uments ▁Men ▁ ▁Edward ▁Mus gro ve ▁De ale y , ▁ 1 9 1 0 ▁- ▁second ▁student ▁at ▁Terr ill ; ▁ ▁President ▁of ▁A . H . ▁Bel o ; ▁publish er ▁of ▁the ▁Dallas ▁Mor ning ▁News ▁Tod die ▁Lee ▁W yn ne , ▁ 1 9 1 5 ▁- ▁invest or . ▁Co - developer , ▁Six ▁Fl ags ▁Over ▁Texas , ▁Dallas ▁Cow bo ys , ▁and ▁ 1 st ▁private ▁ro cket ▁into ▁space ▁ ▁Ed win ▁F . ▁Bla ir , ▁ 1 9 2 0 ▁- ▁att orney , ▁corpor ate ▁leader , ▁All ▁American ▁football ▁player , ▁" Mr . ▁Y ale " ▁