David Cox came to oil painting late in his career, when he was already established as one of the leading watercolourists of his day. Determined to master this new medium at the age of fifty-six, he took lessons in 1839 from the young Bristol-born painter William James Müller, almost thirty years his junior. For the remainder of his career he worked confidently in both media, sometimes producing variations on the same theme in both oil and watercolour.