Possible Clues:

• Town man's old overcoat with a velvet collar
• Coat with a twist could be sat on
• Whence heretics fled in disarray?
• Being tortured heretics fled town
• Type of sofa (in Derbyshire?)
• Not just a seat for a Derbyshire MP
• From sofa, encourage those running round street
• Sofa (with crooked spire?)
• He wrote, advising his son to get overcoat
• Man of letters is well-upholstered