The drawing is part of a sequence of notes and diagrams which continues back through the sketchbook to folio 72 verso (D07473). The text continues from the opening passage, on the verso (D07487), to folio 78 verso opposite (D07485), and the diagram relates to passages on the latter page and folio 77 verso (D07483). There is a similar (apparently unfinished) diagram on folio 78 recto (D07484), and a related diagram of a river bank on folio 76 recto (D07480). The semi-diagrammatic drawing on folio 81 verso (D07491) also appears to belong with these notes, concerned with sunlight or light in general in terms of reflections and the casting of light and shadow from polished objects or bodies of water. They relate to Turner’s fifth Royal Academy perspective lecture, on reflection and refraction.
Davies 1994, p.289.
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