▁name ▁was ▁Saint - Se ine . ▁He ▁app r entic ed ▁with ▁his ▁father ▁as ▁a ▁pilot ▁on ▁the ▁Saint ▁Lawrence ▁River . ▁In ▁ 1 8 3 9 , ▁he ▁was ▁h ired ▁as ▁a ▁pur ser ▁on ▁a ▁ste amer ▁on ▁the ▁river . ▁He ▁established ▁a ▁steam ship ▁service ▁on ▁the ▁Rich el ieu ▁River , ▁with ▁himself ▁as ▁captain , ▁in ▁ 1 8 4 5 . ▁This ▁company ▁am alg am ated ▁with ▁a ▁compet ing ▁service ▁to ▁form ▁La ▁Comp ag nie ▁du ▁Rich el ieu ; ▁S inc ennes ▁later ▁served ▁as ▁secretary - tre as urer ▁and ▁president ▁for ▁the ▁company . ▁The ▁company ▁expanded ▁to ▁provide ▁service ▁between ▁Montreal ▁and ▁Quebec ▁City ▁and ▁absor bed ▁a ▁number ▁of ▁its ▁compet itors . ▁In ▁ 1 8 7 5 , ▁it ▁am alg am ated ▁with ▁the ▁Canadian ▁Navigation ▁Company ▁to ▁form ▁the ▁Rich el ieu ▁and ▁Ontario ▁Navigation ▁Company , ▁later ▁Canada ▁Ste am ship ▁L ines , ▁operating ▁on ▁the ▁Saint ▁Lawrence ▁and ▁the ▁Great ▁L akes . ▁In ▁ 1 8 4 9 , ▁S inc ennes , ▁with ▁William ▁Mc N aught on , ▁formed ▁the ▁S inc ennes - Mc N aught on ▁Line ▁which ▁to wed ▁and ▁ber th ed ▁ships ▁on ▁the ▁Ott awa , ▁Rich el ieu ▁and ▁Saint ▁Lawrence ▁rivers . ▁In ▁ 1 8 5 7 , ▁he ▁was ▁elected ▁to ▁the ▁Legisl ative ▁Assembly ▁of ▁the ▁Province ▁of ▁Canada ▁for ▁Rich el ieu