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Made with the page turned horizontally, this is a slight note. Turner made at least two works at this time in which a burst of sunlight through cloud is a leading motif: the perhaps unfinished large-scale study of Llanberis and Snowdon (Tate D03642; Turner Bequest LX a A), and the finished watercolour of Pembroke Castle: Clearing up of a Thunder-Storm, exhibited at the Royal Academy in 1806 (Art Gallery of Ontario, Toronto).1
Andrew Wilton, J.M.W. Turner: His Life and Work, Fribourg 1979, p.331 no.281, reproduced.