Complex sentence: He was first interred in a private mausoleum on his Annandale property, until its subdivision to become the inner city suburb upon which his remains were moved to a new mausoleum at Waverley Cemetery in 1904.
Split into simpler sentences: He was first interred in a private mausoleum on his Annandale property, until its subdivision to become an inner city suburb. His remains were moved to a new mausoleum at Waverley Cemetery in 1904.