Complex sentence: He seems to have studied medicine for a year, but changed his mind when he gained his adult voice: it was at first a baritone, and he made his earliest appearance at Newcastle in 1839 in various baritone parts.
Split into simpler sentences: He seems to have studied medicine for a year, but changed his mind when he gained his adult voice: it was at first a baritone. He made his earliest appearance at Newcastle in 1839 in various baritone parts.