A short biography of Robert Ball Hughes is available in the book: Dorchester: A Compendium by Anthony Mitchell Sammarco, Charleston: The History Press, 2011, pp. 61-63. Sammarco is a Boston Historian and an author of over 60 books.
Page 61 of the book has a black and white image of the Portrait of Robert Ball Hughes by Col. John Trumbull (1756-1843).
See the Preview of the book on Google Books.
Watch a 2009 Interview with Anthony Mitchell Sammarco by Talia Whyte: