1909
A.J. Finberg, A Complete Inventory of the Drawings of the Turner Bequest, London 1909, vol.II, p.721, CCXXXV 11a, as ‘River, with buildings. – “Buffarlo.”’.
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Powell, ‘Turner on Classic Ground: His Visits to Central and Southern Italy and Related Paintings and Drawings’, unpublished Ph.D thesis, Courtauld Institute of Art, University of London 1984, p.343 note 180.
2007
Federico Crimi, ‘J.M.W. Turner e il Verbano: 1819: Torino, Milano e il Sempione’, in Verbanus, no.28, 2007, p.26 note 26.