1909
A.J. Finberg, A Complete Inventory of the Drawings of the Turner Bequest, London 1909, vol.I, p.575, as ‘Sketch of the “Jonas”. By Lorenzetto, in the Chigi Chapel, Santa Maria del Popolo’.
1969
John Gage, Colour in Turner: Poetry and Truth, London 1969, pp.93, 241 note 72.
1984
Cecilia Powell, ‘Turner on Classic Ground: His Visits to Central and Southern Italy and Related Paintings and Drawings’, unpublished Ph.D thesis, Courtauld Institute of Art, University of London 1984, p.148 note 91.
1987
Robert E. McVaugh, ‘Turner and Rome, Raphael and the Fornarina’, Studies in Romanticism, no.26, Fall 1987, p.386.
1987
Cecilia Powell, Turner in the South: Rome, Naples, Florence, New Haven and London 1987, pp.61, 203 note 54.