BBC News Published image copyrightHastings Contemporary image captionMackerel Sky by Eric William Ravilious was sold a year after it was painted, and was not seen in public for decades A painting by one of the UK's finest watercolour artists that was "considered missing" for 82 years is to be put on display. Mackerel Sky by Eric William Ravilious was sold to a private collector for 15 guineas in 1939. The current owner is loaning it to Hastings Contemporary art gallery for its Seaside Modern Exhibition. Curator and art historian James Russell said the painting reappearing was "exciting news for Ravilious fans". "This 1938 gem, Mackerel Sky, was considered missing for years but has now resurfaced and will feature in my exhibition," added Mr Russell in a tweet.