1909
A.J. Finberg, A Complete Inventory of the Drawings of the Turner Bequest, London 1909, vol.I, p.496.
1982
Cecilia Powell, ‘Topography, Imagination and Travel: Turner’s Relationship with James Hakewill’, Art History, vol.5, no.4, December 1982, pp.415 and 424 note 45.
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Powell, ‘Turner on Classic Ground: His Visits to Central and Southern Italy and Related Paintings and Drawings’, unpublished Ph.D thesis, Courtauld Institute of Art, University of London 1984, pp.209 note 41, 469 note 138.
1987
Cecilia Powell, Turner in the South: Rome, Naples, Florence, New Haven and London 1987, p.202 note 66.