Complex sentence: Of these concurrent terms, Scott served fifteen months, at the expiration of which time he returned to Sydney where, in March 1872, he was arrested on the charge of robbing the Egerton Bank and forwarded to Ballarat for examination and trial.
Split into simpler sentences: Of these concurrent terms, Scott served fifteen months, at the expiration of which time he returned to Sydney, and there, in. March, 1872, he was arrested on the charge of robbing the Egerton Bank, and forwarded to Ballarat for examination and trial.