. ▁Nothing ▁is ▁known ▁of ▁his ▁family ▁or ▁early ▁life , ▁but ▁he ▁went ▁to ▁London ▁where ▁he ▁established ▁an ▁Academy . ▁He ▁became ▁a ▁t utor ▁to ▁the ▁two ▁sons ▁of ▁the ▁Earl ▁of ▁P onte f ract ▁at ▁East on ▁in ▁ ▁North umber land . ▁Between ▁ 1 7 8 2 ▁and ▁ 1 7 8 5 , ▁he ▁was ▁appointed ▁Professor ▁of ▁Mathemat ics ▁at ▁the ▁Royal ▁Military ▁Academy , ▁W ool wich , ▁where ▁he ▁remained ▁until ▁his ▁death ▁on ▁ 1 5 ▁May ▁ 1 8 2 1 . ▁ ▁He ▁was ▁a ▁pro l ific ▁writer , ▁and ▁wrote ▁for ▁the ▁early ▁volumes ▁of ▁Re es ' s ▁Cy c lop ædia , ▁about ▁algebra , ▁analysis ▁and ▁astronom y . ▁ ▁Family ▁At ▁the ▁age ▁of ▁ 1 9 , ▁he ▁married ▁a ▁Miss ▁Rol t , ▁but ▁she ▁died ▁young . ▁On ▁Oct . 7 th , ▁ 1 7 8 6 ▁he ▁married ▁Brig ette ▁New ell ▁with ▁whom ▁he ▁had ▁six ▁children ▁Charlotte , ▁William , ▁Mary , ▁Sir ▁Richard ▁( Ro yal ▁Engine er / Author ), ▁Hum ph rey ▁and ▁Charles . ▁ ▁His ▁son ▁Richard ▁Henry ▁Bon ny castle ▁settled ▁in ▁Canada , ▁where ▁the ▁family ▁became ▁quite ▁well ▁known ▁in ▁W inn ip eg ▁and ▁Cal g ary . ▁ ▁His ▁son , ▁Charles ▁Bon ny castle ▁ ▁( 1 7 9 6 - 1 8 4 0 ) ▁became ▁Professor ▁of ▁Mathemat ics ▁at ▁the ▁University ▁of