Complex sentence: He left Rossall School in 1865 and in 1867 enrolled as a probationer at the Royal Academy Schools and on 8 January 1868 he was admitted as a student there, which was a professional path against his parents' wishes.
Split into simpler sentences: He left Rossall School in 1865, and in 1867 enrolled as a probationer at the Royal Academy Schools. On 8 January 1868 he was admitted as a student there-which was a professional path against his parents' wishes.