Complex sentence: The magazine was edited briefly by the novelist-dramatist Edmund Yates, but after he resigned in July 1867, after searching unsuccessfully for a suitable successor, in November 1867 Bentley himself took on the editorship of Temple Bar.
Split into simpler sentences: The magazine was edited briefly by the novelist-dramatist Edmund Yates, but he resigned in July 1867. After searching unsuccessfully for a suitable successor, in November 1867 George Bentley himself took on the editorship of Temple Bar.