In April 2013, Van Dyke revealed that for seven years he had been experiencing symptoms of a neurological disorder, in which he felt a pounding in his head whenever he lay down; but despite his undergoing tests, no diagnosis had been made.[55] He had to cancel scheduled appearances due to fatigue from lack of sleep because of the medical condition.[56] In May 2013, he tweeted that it seemed his titanium dental implants may be responsible.[57]
In 1892 Émile Bernard organised a small solo show of Van Gogh's paintings in Paris, and Julien Tanguy exhibited his Van Gogh paintings with several consigned from Johanna van Gogh-Bonger. In April 1894 the Durand-Rue Gallery in Paris agreed to take 10 paintings on consignment from Van Gogh's estate.[269] In 1896, the Fauvist painter Henri Matisse, then an unknown art student, visited John Peter Russell on Belle Île off Brittany.[270][271] Russell had been a close friend of Van Gogh; he introduced Matisse to the Dutchman's work, and gave him a Van Gogh drawing. Influenced by Van Gogh, Matisse abandoned his earth-coloured palette for bright colours.[271][272]