This sketch is very similar to the drawing on folio 47 (D26528) that formed the basis of Turner’s watercolour Loch Katrine circa 1832 (British Museum),1 engraved to illustrate volume 8 of Sir Walter Scott’s Poetical Works, The Lady of the Lake in 1834. (See folio 47 for further references). As David Wallace-Hadrill and Janet Carolan have pointed out, the view is from above the Silver Strand beach (now submerged as the water level of Loch Katrine was raised to make a reservoir for Glasgow) on the northern shore of Loch Katrine at the east end. The beach, which runs along a bay, is shown from the lower slopes of Ben A’an above. Across the loch is Ellen’s Island (Eilean Molach) and beyond that Ben Venue.
Turner made a number of sketches of the view from around this point; see folio 47 for references and further details.
Andrew Wilton, J.M.W. Turner: His Life and Work, Fribourg 1979, p.1084 no.1084.