See note to folio 61 verso of the sketchbook (D05588), where it is suggested that both sketches fit together to form the composition used for the watercolour Chryses, exhibited at the Royal Academy in 1811 (private collection),1 and the unpublished Liber Studiorum plate Glaucus and Scylla. In this sketch, the reflection of sunlight on the waters of a bay and a mountainous horizon, common to both subjects, are already sketched in. The right portion of these two compositions, containing wooded rocks with an arched opening and a curving sweep of shore, seems to be taking shape in the sketch on folio 61 verso.
Andrew Wilton, The Life and Work of J.M.W. Turner, Fribourg 1979, p.356 no.492.