In 1833, Isaac decided that the two most musically talented of his children, Julius (then aged 18) and Jacob (14) needed to leave the provincial musical scene of Cologne to study in Paris.
Tahun 1833, Isaac memutuskan bahwa dua orang anaknya yang paling berbakat dalam musik, Julius (saat itu berusia 18 tahun) dan Jacob (14) perlu belajar musik di Paris.