The last gained him the friendship of the Marchesa di Barolo, the reformer of the Turin prisons, and in 1834 he accepted from her a yearly pension of 1200 francs.
After her death, much against the advice of his remaining son arrd heir, Carlino (afterwards Charles Emmanuel III.), he married the Contessa di San Sebastiano, whom he created Marchesa di Spigno, abdicated the crown and retired to Chambery to end his days (1730).
The Marchesa Vitelleschi's work, The Romance of Savoy (2 vols., London, 1905), is based on original authorities, and is the most complete monograph on the subject.
On the decease of his parents in 1838 he was received into the Casa Barolo, where he remained till his death, assisting the marchesa in her charities, and writing chiefly upon religious themes.
A fragmentary biography of the marchesa by Pellico was published in Italian and English after her death.