▁Ell ison ▁became ▁senior ▁science ▁master ▁at ▁Sher bor ne ▁School ▁in ▁Dor set , ▁ 1 9 3 3 , ▁then ▁married ▁Pat ric ia ▁Her ron ▁in ▁ 1 9 3 4 . ▁The ▁couple ▁had ▁two ▁daughters ▁and ▁a ▁son . ▁He ▁also ▁completed ▁his ▁own ▁spect ro hel ios cope ▁during ▁this ▁period , ▁to ▁study ▁the ▁Sun ▁following ▁the ▁sun spot ▁minimum . ▁With ▁the ▁start ▁of ▁the ▁world ▁war , ▁he ▁organized ▁an ▁Air ▁Cad et ▁Training ▁Corps , ▁then ▁joined ▁the ▁Oper ational ▁Research ▁Group ▁at ▁the ▁Admir alty . ▁ ▁In ▁ 1 9 4 6 ▁he ▁became ▁a ▁member ▁of ▁the ▁International ▁Astronom ical ▁Union . ▁The ▁following ▁year , ▁he ▁joined ▁the ▁Royal ▁Observ atory , ▁Edinburgh , ▁where ▁he ▁continued ▁studies ▁of ▁solar ▁activity , ▁including ▁fl ares ▁and ▁prom in ences . ▁In ▁ 1 9 4 8 ▁he ▁was ▁elected ▁a ▁Fellow ▁of ▁the ▁Royal ▁Society ▁of ▁Edinburgh . ▁He ▁remained ▁at ▁the ▁observ atory ▁for ▁eleven ▁years ▁and ▁published ▁multiple ▁scientific ▁papers ▁on ▁his ▁work . ▁He ▁also ▁was ▁invited ▁to ▁lect ured ▁on ▁astronom y , ▁and ▁gave ▁radio ▁and ▁television ▁inter views ▁about ▁solar ▁activity . ▁Mary ▁Br ück ▁completed ▁her ▁Ph D ▁with ▁him ▁in ▁ 1 9 5 0 . ▁ ▁For ▁five ▁years ▁he ▁was ▁joint ▁editor ▁of ▁The ▁Observ atory . ▁He ▁also ▁played ▁a ▁leading ▁role ▁in ▁the ▁scientific ▁work ▁during ▁the ▁International ▁Ge oph ys ical ▁Year , ▁serving ▁as ▁solar