Saint-Paul-de-Mausole asylum on 8 May 1889, accompanied by his caregiver, Frédéric Salles, a Protestant clergyman. Saint-Paul was a former monastery in Saint-Rémy, located less than from Arles, and it was run by a former naval doctor, Théophile Peyron. Van Gogh had two cells with barred windows, one of which he used as a studio. The clinic and its garden became the main subjects of his paintings. He made several studies of the hospital's interiors, such as Vestibule of the Asylum and Saint-Rémy (September 1889), and its gardens, such as Lilacs (May 1889). Some of his works from this time are characterised by swirls, such as The Starry Night. He was allowed short supervised walks, during which time he painted cypresses and olive trees, including Valley with Ploughman Seen from Above, Olive Trees with the Alpilles in the Background 1889, Cypresses 1889, Cornfield with Cypresses (1889), Country road in Provence by Night (1890). In September 1889, he produced two further versions of Bedroom in Arles and The Gardener. Limited access to life outside the clinic resulted in a shortage of subject matter. Van Gogh instead worked on interpretations of other artist's paintings, such as Millet's The Sower and Noonday Rest, and variations on his own earlier work. Van Gogh was an admirer of the Realism of Jules Breton, Gustave Courbet and Millet, and he compared his copies to a musician's interpreting Beethoven. His Prisoners' Round (after Gustave Doré) (1890) was painted after an engraving by Gustave Doré (1832–1883). Tralbaut suggests that the face of the prisoner in the centre of the painting looking towards the viewer is Van Gogh himself; Jan Hulsker discounts this. Between February and April 1890, Van Gogh suffered a severe relapse. Depressed and unable to bring himself to write, he was still able to paint and draw a little during this time, and he later wrote to Theo that he had made a few small canvases "from memory ... reminisces of the North". Among these was Two Peasant Women Digging in a Snow-Covered Field at Sunset. Hulsker believes that this small group of paintings formed the nucleus of many drawings and study sheets depicting landscapes and figures that Van Gogh worked on during this time. He comments that this short period was the only time that Van Gogh's illness had a significant effect on his work. Van Gogh asked his mother and his brother to send him