Complex sentence: His estate library was sold in a catalogue sale by Basil Blackwell's during the 1970s, indicating a well-read individual with wide-ranging interests particularly with respect to historical fiction and Europe.
Split into simpler sentences: His estate library was sold in a catalogue sale by Basil Blackwell's in the 1970s. It suggested a well-read individual with wide-ranging interests particularly with respect to historical fiction and Europe.