Complex sentence: In 1887 he entered into partnership with Williamson, Garner & Musgrove as manager of the Theatre Royal, Adelaide, and around 1889 he became sole lessee of the theatre, and occupied that position till 1900, when he retired to be succeeded by Pollock.
Split into simpler sentences: In 1887 he entered into partnership with Williamson, Garner & Musgrove as manager of the Theatre Royal, Adelaide, and around 1889 he became sole lessee of the theatre. Reeve occupied that position till 1900, when he retired to be succeeded by Pollock.