Complex sentence: In 1882 instrumental classes were also started, attracting 458 students on their first year, and a separate music section created within the Institute that was formally established as the "School of Music" in 1886, with William Stockley as its first Principal.
Split into simpler sentences: In 1882 instrumental classes were also started, attracting 458 students on their first year, and a separate music section created within the Institute. This was formally established as the "School of Music" in 1886, with William Stockley as its first Principal.