A drawing of the same composition was sold at Christie's on behalf of the executors of the late Mrs. Helen Langford-Brooke at Mere Hall, Knutsford, 23 May 1994, lot 232, illustrated. A similar view, showing the same group of figures on the left and dated 1787, is in a private collection in Rome, N. Spinosa and L. di Mauro, Vedute napoletane del settecento, Naples, 1989, p. 296, illustrated.