[citation needed] Fitzgerald-de Ros briefly served as member of parliament for the borough of West Looe from 1816 to 1818.
Lord de Ros was accused of cheating at Graham's Club by the trick of sauter la coupe, and by marking the cards with his thumbnail.
He died not long after, and was commemorated by Theodore Hook with the punning epitaph, "Here lies the premier baron of England, patiently awaiting the last trump".
It has been suggested that Charles Dickens may have based the character of Sir Mulberry Hawk in his novel Nicholas Nickleby to some extent on Lord de Ros, a man-about-town with a reputation for fleecing gullible young men, seducing women and various forms of swindling.
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