9 ). ▁ ▁He ▁married ▁again ▁in ▁ 1 8 7 3 ▁to ▁Am é lie ▁Ha asz m ▁( 1 8 4 2 – 1 9 2 9 ), ▁with ▁whom ▁he ▁had ▁another ▁three ▁children , ▁Alexander ▁( 1 8 7 5 – 1 9 5 7 ), ▁Richard ▁( 1 8 8 1 – 1 9 4 2 ), ▁and ▁Christ ine ▁( 1 8 8 2 – - 1 8 8 4 ). ▁He ▁died ▁in ▁his ▁h omet own ▁on ▁January ▁ 2 4 , ▁ 1 9 0 5 ▁at ▁the ▁age ▁of ▁ 8 1 . ▁ ▁Career ▁ ▁After ▁receiving ▁a ▁private ▁education ▁in ▁a ▁family - run ▁school , ▁he ▁began ▁app r entic ing ▁at ▁age ▁four teen ▁with ▁his ▁uncle , ▁J . ▁Mort on ▁Po ole , ▁in ▁a ▁machine ▁shop ▁near ▁Wil ming ton , ▁Del aware . ▁ ▁After ▁seven ▁years , ▁he ▁moved ▁to ▁Prov idence , ▁Rh ode ▁Island ▁to ▁run ▁the ▁sh ops ▁of ▁what ▁eventually ▁became ▁the ▁Cor l iss ▁Ste am ▁Engine ▁Company . ▁Return ing ▁to ▁West ▁Philadelphia ▁to ▁start ▁his ▁own ▁machine ▁company , ▁he ▁eventually ▁formed ▁a ▁partners hip ▁with ▁his ▁brother - in - law ▁Edward ▁B anc ro ft ▁( 1 8 1 1 – 1 8 5 5 ) ▁in ▁ 1 8 4 8 . ▁After ▁B anc ro ft ' s ▁death ▁in ▁ 1 8 5 5 , ▁S ellers ▁incorpor ated ▁as ▁William ▁S