Complex sentence: Gandy was the younger brother of Joseph Michael Gandy (q. v.) and of John Peter Gandy-Deering, was a pupil of James Wyatt, whose office he left on receiving an appointment in the Indian naval service.
Split into simpler sentences: Gandy was the younger brother of Joseph Michael Gandy and of John Peter Gandy-Deering. He became a pupil of James Wyatt, whose office he left on receiving an appointment in the Indian naval service.