In 1886, Theo invited Vincent to live with him in Paris, and from March they shared an apartment in Montmartre. Theo introduced Vincent to Paul Gauguin, Paul Cézanne, Henri de Toulouse-Lautrec, Henri Rousseau, Camille Pissarro and Georges Seurat, and in 1888 he persuaded Gauguin to join Vincent, who had moved to Arles. Theo not only conspired with Vincent as the liaison between Vincent and Gauguin, but was the deciding factor in his move to Arles seeing as it was Theo van Gogh who planned and eventually committed to supporting them both financially. He paid for living and professional expenses as well as for the travel expenses Gauguin accumulated to get from Pont Aven, Brittany, to Arles. Theo was equally the one with whom Gauguin communicated when his relationship with Vincent turned volatile and unmanageable, notably the severing of the ear fiasco. Theo was the source of stability and the intermediate between the two artists and allowed them to create prolifically for a couple of months (63 days); paintings that would otherwise not have survived. Competing with Durant-Ruel and Georges Petit, the young dealer was to take over an important stake in this market. In 1888, he exhibited ten paintings by Monet from Antibes. Theo also had close relations with Pissarro, and in the Autumn 1888, he presented a few of the painter's latest works and in 1890 he devoted an exhibition to him. Degas allowed him to set up a small exhibition of his nudes in January 1888 and a year later an exhibition of a selection of his works. Theo was also interested in Sisley, Renoir, and other such "moderns" as Besnard, Carrière and Raffaëlli. Correspondence The two brothers maintained an intensive correspondence, with Theo often encouraging his depressed brother. Theo was one of the few people Vincent could talk to and confide in. These letters are one of the few sources of information about Vincent's life, providing detailed accounts of not only the occurrences but also the thoughts and feelings in his life. Over three-quarters of the more than 800 letters Vincent wrote were to Theo, including his first and his last. It is largely thanks to Theo and his wife Johanna, who in 1914 decided to publish the letters between Theo and Vincent, that the letters are available. Hardly any of Theo's letters survive because Vincent failed to keep them. The two-year period in which Vincent and