▁years , ▁at ▁ 2 2 ▁and ▁having ▁completed ▁his ▁app rent ices hip , ▁G oss ler ▁left ▁Hamburg ▁to ▁work ▁for ▁a ▁company ▁in ▁Cad iz , ▁and ▁travel led ▁extens ively ▁in ▁Spain , ▁Portugal , ▁France ▁and ▁England . ▁ ▁In ▁ 1 7 6 8 , ▁he ▁returned ▁to ▁Hamburg , ▁where ▁he ▁married ▁Elisabeth ▁Ber enberg ▁( 1 7 4 9 – 1 8 2 2 ) ▁in ▁the ▁same ▁year . ▁She ▁was ▁the ▁only ▁daughter ▁of ▁the ▁Ber enberg ▁company ' s ▁surv iving ▁owner , ▁Johann ▁Ber enberg ▁( 1 7 1 8 – 1 7 7 2 ). ▁Johann ▁Ber enberg ▁made ▁his ▁son - in - law ▁a ▁partner ▁in ▁ 1 7 6 9 . ▁Upon ▁the ▁death ▁of ▁Johann ▁Ber enberg ' s ▁brother ▁Corn el ius ▁in ▁ 1 7 7 3 , ▁the ▁Ber enberg ▁family ▁became ▁ext inct ▁in ▁the ▁male ▁line ▁and ▁Johann ▁Hin rich ▁G oss ler ▁became ▁the ▁company ' s ▁sole ▁owner . ▁In ▁ 1 7 8 8 , ▁G oss ler ▁took ▁on ▁his ▁own ▁son - in - law ▁Ludwig ▁Erd win ▁Se y ler ▁( mar ried ▁to ▁his ▁el dest ▁daughter ▁Anna ▁Henri ette ▁G oss ler ) ▁as ▁a ▁partner . ▁ ▁Johann ▁Hin rich ▁G oss ler ▁was ▁the ▁father ▁of ▁Hamburg ▁sen ator ▁and ▁bank er ▁Johann ▁Heinrich ▁G oss ler ▁II ▁( 1 7 7 2 – 1 8 4 2 ) ▁and ▁the