Original sentence: Displaying his old masters collection to the public at his London house on Duchess Street, a mansion at 116 Piccadilly and at Deepdene, he was also a patron to idealists such as Young England and the Spanish Carlists and helped organise the 1851 Great Exhibition
Edited sentence: Displaying his old masters collection to the public at his London house on Duchess Street, a mansion at 116 Piccadilly and at Deepdene, Surrey, he was also a patron to idealists such as Young England and the Spanish Carlists and helped organise the 1851 Great Exhibition